Almost any RV manual is just a collection of the manuals that the appliance manufacturers put out and any other information is just about useless.
We have a longtime member, Chris Bryant, now retired from his RV service business, who has generously provided a link to many manuals, both RV's themselves and appliances used in RV's, on his company website. You can check out the various categories on his site
here.You would probably be best served by looking up the model numbers of the various items in your trailer and then searching for the manual for each item.
Good luck.
๐Barney
2004 Sunnybrook Titan 30FKS TT
Hensley "Arrow" 1400# hitch (Sold)
Not towing now.
Former tow vehicles were 2016 Ram 2500 CTD, 2002 Ford F250, 7.3 PSD, 1997 Ram 2500 5.9 gas engine