Mine is located under my sink area for the front LR slide. If you have a Dry Bar it could be in that cabinet also.
Looking at your floor plan it could be in your Hutch cabinet, bedroom maybe in your large rear closet.
Some DP's have them on chassis frame side rails outside in weather proof box.
Why is it necessary to adjust the pot on control?
If you do adjust do with only slite adjustments.
If you go to
Quick Tips there is information on controllers and how your slides should work.
Welcome to the Newmar forum.