I got the auxillary battery installed, without explosion.Hope it works
ok.The hardest part was accepting the premise that 2 skinny wires are the
hook ups that are to be screwed to the top of each terminal. The only
interesting  part in installing this kit was  when I undid the existing
relay that vw installed. It had 5 hook ups , where the new relay had 4.Not
hard to figure out what to do.In fact , this conversion is so easy to do ,
I had to make it more difficult than it was. I ended up using only 2 of the
4 wires provided.The screw that came with the kit , to screw into the
battery post ,makes the post overall,too tall, and the lid may make contact
withthe post (zap!). I used hose clamps to hold the wires onto the battery
posts instead.This project was an opportunity to remove both seats and hose
them down.While I was at it , I hosed down the 2 batterys.In the end, if
you have a westy , and want a auxillery battery, all you need is a battery
(one without a vent), an 8 inch wire to go from the  existing relay to the
positive battery post (contact 87 on the relay I think),2 hose clamps, and
a  thin wire for the ground on the new battery.Just run 1 new wire on the
87 contact to the battery, and from the positive post of the battery, run 2
wires to the westy fuse box.That is  a total of 3 wires held onto the post
with a hose clamp. That is it! Your done!