What you probably need is the brand specific manuals for those, often (usually, almost always) the maker of the rig never puts those in "their" manual, but rather includes the manual(s) from the builder of the "fill in the blank"
Find out the brand of the fuel station and see if the make can provide you with a PDF
The maker of the genset almost certainly has a PDF available
I would recommend you go any buy "The RV Repair and Maintenance Manual", by Bob Livingston (available at Camping World, Amazon and many other locations)
