Hey all. So I am driving a 1995 gmc rally van g3500. I have dual batteries set up and all ready to go, it works and charges and everything, woop!

My battery isolator relay needs its own 12v power source to close the circuit and connect the aux battery. (edit this has to be a "true ignition" source so it has to be hot when the key is in the crank/run positions) I found a wire that had alraedy been hacked by the previous owner and tapped into it, sure enough I picked an ignition wire! Lucky me! Problem is ...

i went out on a drive once it was all stitched back together, put on the turn signal and heard clackclack! from the relay every time the flasher blinked So yea i need a better wire .... hehehhh

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anyways. So i'm going to do one of two things. I'm either going to get a fuse tap connector; or, There are empty slots on my fuse panel for ign/acc/bat. So i could just tap into that empty IGN socket. I'm just not sure what kind of connector I need to tap into that socket! It looks like it needs some kind of block/molex type connector. Does anybody know how I can tap into that by chance?

many thanks! -b