Best thing is to actuate the remote and listen very carefully. The receiver unit will "click' when actuated. Usually just a very short press of the button will cause a click. Either press the in or out direction will be enough to energize it. Do this as often as needed, until you can locate where the unit is located.
My remote receiver is mounted on the side wall, under the stairs. And beside the entrance door. The converter is mounted under the stairs. One stair tread flips up to show the converter. I had a heck of a time when looking for the remote receiver. The above description is how I found the location. I had to remove the the air grid on the front of the stairs, and reach around to the wall to work on the receiver.
'12 F350 SB, CC, SRW, 6.7 PSD, 3.55 RAR, 6 spd auto
2015 DRV 38RSS 'Traditions'
Pullrite Super Glide 18K
Retirement = It's all poops and giggles....UNTIL someone Giggles and Poops.