i've been following the 2nd battery thread w/ interest, but after 10 pm
my brain can't process virtual wire schematics.
i have a 90 multi van and noticed i have that relay under my driver's
seat, and Bentley says so too. this is a camper top van w/one back
cabinet ---not a kitchen.   do i need anything else (besides the batt )
to set up the dual battery(i'll be using a couple gel cells)?
i'm not asking for instructions--just how much more do i need if any.

thank you in advance,

chris c
wisconsin westy