pi@retropie:/opt/retropie/configs/all/retroarch/config $ ls -l
total 5512
drwxr-xr-x 2 pi pi 102400 Jan 15 20:24 'Beetle Supafaust'
drwxr-xr-x 2 pi pi  69632 Jan 11 21:02  BlastEm
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23  bnes
drwxr-xr-x 2 pi pi  98304 Jan  8 09:27  bsnes
drwxr-xr-x 2 pi pi 102400 Jan  8 09:27  bsnes2014
drwxr-xr-x 2 pi pi 102400 Jan  8 09:27 'bsnes-hd beta'
drwxr-xr-x 2 pi pi  94208 Jan  8 09:27  bsnes-mercury
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23 'emux (nes)'
drwxr-xr-x 2 pi pi  32768 Jan 11 20:59 'emux (sms)'
drwxr-xr-x 2 pi pi 286720 Jan 14 22:09 'FB Alpha'
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23  FCEUmm
drwxr-xr-x 2 pi pi 282624 Jan 14 22:09 'FinalBurn Neo'
drwxr-xr-x 2 pi pi  36864 Jan 14 23:28  Frodo
drwxr-xr-x 2 pi pi 663552 Jan  8 09:05  FS-UAE
drwxr-xr-x 2 pi pi  28672 Jan 11 20:59  Gearsystem
drwxr-xr-x 2 pi pi  90112 Jan 11 21:02 'Genesis Plus GX'
-rw-r--r-- 1 pi pi     49 Jan 12 22:10  global.glslp
drwxr-xr-x 2 pi pi 286720 Jan 14 22:10  MAME
drwxr-xr-x 2 pi pi 286720 Jan 14 22:10 'MAME 2003 (0.78)'
drwxr-xr-x 2 pi pi 278528 Jan 16 15:40 'MAME 2003-Plus'
drwxr-xr-x 2 pi pi 282624 Jan 14 22:10 'MAME 2010'
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23  Mesen
drwxr-xr-x 2 pi pi  94208 Jan  8 09:27  Mesen-S
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23  Nestopia
drwxr-xr-x 2 pi pi  90112 Jan 11 21:02  PicoDrive
drwxr-xr-x 2 pi pi 643072 Jan  8 09:05  PUAE
drwxr-xr-x 2 pi pi  57344 Jan  8 09:23  QuickNES
drwxr-x--- 2 pi pi   4096 Jan  2 19:41  remaps
drwxr-xr-x 2 pi pi  32768 Jan 11 20:59 'SMS Plus GX'
drwxr-xr-x 2 pi pi  94208 Jan  8 09:27  Snes9x
drwxr-xr-x 2 pi pi 102400 Jan  8 09:27 'Snes9x 2002'
drwxr-xr-x 2 pi pi  94208 Jan  8 09:27 'Snes9x 2005'
drwxr-xr-x 2 pi pi  90112 Jan  8 09:27 'Snes9x 2005 Plus'
drwxr-xr-x 2 pi pi  94208 Jan  8 09:27 'Snes9x 2010'
drwxr-xr-x 2 pi pi  36864 Jan  8 09:03  Stella
drwxr-xr-x 2 pi pi  36864 Jan  8 09:03 'Stella 2014'
drwxr-xr-x 2 pi pi 647168 Jan  8 09:06  UAE4ARM
drwxr-xr-x 2 pi pi  36864 Jan 14 23:28  VICE
drwxr-xr-x 2 pi pi  36864 Jan 14 23:28 'VICE SDL'
drwxr-xr-x 2 pi pi  36864 Jan 14 23:28 'VICE x64'
pi@retropie:/opt/retropie/configs/all/retroarch/config $ ls MAME\ 2003-Plus/1943.*
'MAME 2003-Plus/1943.cfg'
pi@retropie:/opt/retropie/configs/all/retroarch/config $ cat MAME\ 2003-Plus/1943.cfg
input_overlay = "/opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943.cfg"
pi@retropie:/opt/retropie/configs/all/retroarch/config $ cat  "/opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943.cfg"
overlays = 1

overlay0_overlay = 1943.png

overlay0_full_screen = true

overlay0_descs = 0
pi@retropie:/opt/retropie/configs/all/retroarch/config $ ls -l /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943*
-rw-r--r-- 1 pi pi     91 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943.cfg
-rw-r--r-- 1 pi pi     94 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943kai.cfg
-rw-r--r-- 1 pi pi 816440 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943kai.png
-rw-r--r-- 1 pi pi     95 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943mii.cfg
-rw-r--r-- 1 pi pi 344175 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943mii.png
-rw-r--r-- 1 pi pi 329950 Jan 15 20:28 /opt/retropie/configs/all/retroarch/overlay/ArcadeBezels/1943.png