I have the 38fl and the distribution panel is just to the right of the steps leading into the front living room. Above the panel is a small coat closet and above that the control panel for things like the water pump, DSI, and various lights.
I bought 3' of #6 cable and installed that on the exit side of the 50 amp PI unit. I then disconnected the supply cable from the distribution panel and fed that into the supply side of the PI unit. It leaves me lots more cable than I need in the basement but this is all hidden behind the wall.
For the display, I pulled the data cable from the PI unit, up through the back of the distribution panel and into the coat closet. I then led it up the closet, tucking it into a corner and then drilled a small hole under the control panel. Fed the data cable through so that it was behind the panel and then drilled another small hole to allow the cable to come out at the front side of the control panel. I then mounted the remote display so that it almost covers the hole I'd drilled but allows the cable to plug into the display. This is all enclosed by the door that conceals the control panel.
Richard & Diane
2014 Cedar Creek 38FL
With a F350 dually
2014 41 nights and 4620km.......and we're done