Piranha dual battery install

[sumnut]

Hi guys I'm trying to fix up my dual battery install that somebody else has botched up. Just wondering where u guys get ur 12v+ switched supply from? I don't really like the idea of cutting into the loom under the steering column and thought there might be a relay that's a bit easier to work on.
Cheers

 

[sparra04]

I picked my ignition source up from back of fuse box under dash