there is no electrical/plumbing info for your camper. nearly all RV manufacturers only provide a generic owner's manual.
they are not just generic but they aren't even RV-type specific.
so there is no manual that has any info specific to your camper, only manuals for the specific appliances in your camper(stove, oven, a/c, fridge, converter and so on).
you can ask questions in the Truck Camper section here at FRF. just be aware the Palomino is the ONLY FR brand that makes truck camper.
you could also try RV.net's Truck Camper Forum, because they'll have all brands of truck campers represented there and you'll probably get more info.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC