Z3 dual battery set up question

[CarFanatic]

I am installing a dual battery charger on my boat. In the z3 which battery is the starting and which is the house? Left or right?

[chpthril]

Which one has the amp B+ cables? The other will be the main cranking. You can also dismount the battery switch and see which battery B+ is connected to the same side of the Dual Circuit Plus switch as the main cable going to the starter. There's two #1 posts and two #2 posts. This eliminates the guess work if both batteries are the same

[CarFanatic]

I figured it out. I'm am an idiot and didn't realize one batt says cranking and the other says deep cycle

[Johnnymac]

What charger did you go with. I'm thinking of this upgrade also.

[chpthril]

I figured it out. I'm am an idiot and didn't realize one batt says cranking and the other says deep cycle

Dont beat your self up....ive seen then put in backwards so the cranking is running the house and the deep is cranking. Fallowing the cables insures the right battery is doing the right job

[CarFanatic]

Man I hope they are right. I tried to follow the wires but it's so tight under there and a lot of the wires go back behind the batts into a small box. The starting batt had a lot more stuff hooked up to it. The other one just had 2 positives and on negative hooked to it.

[CarFanatic]

What charger did you go with. I'm thinking of this upgrade also.

I am using a pro mariner prosport gen 3 20 amp. It's a dual bank. I had the 3 bank on my last boat and it worked great. I have a brand new prosport12 gen 3 if your interested. I bought it first but decided I wanted more amps to keep up with my stereo.

[Goalie30dad]

Okay guys - wondering if you can help a newbie out. Bought a brand new z3 last summer. did not use it much before we put it away for the winter. Had it winterized and the shop removed the batteries. Never thought to ask how to hook em back up
Is there any diagrams? dont want to screw it up. any help would be appreciated