import os

def first_connection():
    os.system('cmdkey /generic:192.168.1.101 /user:Username /pass:Password')
    os.system('mstsc /v:192.168.1.101)'

def second_connection():
    os.system('cmdkey /generic:192.168.1.102 /user:Username /pass:Password')
    os.system('mstsc /v:192.168.1.101)'

first connection()
second_connection()