Do thru the wall AC units in a ground floor frame building require a sleeve or can the installer build a frame around the AC unit ?

i had a 3 speed blow motor to an AC fan coil unit. I disconnected the wiring and installed a new unit and forgot how the wiring goes, i no expert and dont want to burn anything out... from my electrical panel to the blower motor, I have a wire that has 120v, another wire has 40v, and a 3rd wire with 0volts on the motor i have a white thats labeled common, a black, red, blue are all labeled for different speeds.... i forgot how the other motor connected the 3 wires i mention above.... can anyone suggest ? thanks can i connect white 0volt to common and 120v to high speed wire on motor? where would 40v wire go? thanks for any ideas