Newmar Owner here. Had the same search problem couple weeks ago. Searched forEVER. Ours are in the electrical cord bay (shore power bay).
Have to stick head all the way inside bay, look up towards ceiling, all the way, and then the slide controllers are right on the wall of the bay that is now right over your neck.
Impossible to see without being IN the bay almost shoulder deep and on your back.
Hope that at least helps you branch out in your exploration tactics!
Alex Harrison, PhD in Sport Physiology, Support Crew for pro cyclist/triathlete wife.
Working/living full-time, boondocking-only, since 2019 in our custom remodel:
2007 Newmar All-Star 4153ME (Class A, DP, toyhauler), 1996 Jeep Cherokee.