Can I use this battery isolator?

Jan 2, 2005
CouleeDamWA, BoiseID
I picked up a battery isolator onsale for like 5 bucks. This one has four terminals. A1 is for the main battery, B1 is for the Aux battery, A is ofcourse for the alternator, and I is for the ignition. Now comes the part that I am getting kornfussed about. What do I do with the I terminal? I have an external regulator. And I think the I terminal is used for Delco's? NOCO IGD-90

Im not even sure if I can use this now. ?

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