Event event;

void h_CG_EntityEvent(centity_t *cent, vec3_t loc)
{
    entityState_t* es = &cent->currentState;

    if ((int)(es->event & ~EV_EVENT_BITS) == EV_BULLET_HIT_FLESH)
    {
        int target = es->eventParm; // since it just contains 1 param, we can be sure it is our target clientNum

        if (session.Convert3DTo2DCoords(players[target].origin, &x, &y) // You got the origin right here!
        {
            // register your starttime here, loop in DrawActiveFrame or wherever it constantly does anything...
            // below is just to time your message.
            event.Starttime = hooks.cg_time; // event.startTime > main.cg_time + 2000 (= 2 secs)

            draw.drawTimedMessage(event.Starttime, x, y);
        }
    }
}