battery question

[Katemma Life]

I have three car batts in the engine compartment. Two are high cranking amp to start each engine. One is a smaller battery; seemingly for all accessories. I've lost track of which spot they all go in because I remove them every year during the winter. Is there some way to identify which one should go where via the cabling when I put them back in this spring?
Thanks!

 

[electricaldoctor]

Take pics once you get it set up properly.

 

[markrsimon]

When you get it figured out, label the batteries as needed (aft, port, etc).. as for layout, have you checked the owners manual? placement and purpose are typically covered there..

not sure if this is yours or not..
https://s3.amazonaws.com/srweb-pvt-prod-us-east-1-294962523550/static/owners-manuals/2007_290 SLX_290 SLX (OMS).pdf

Here's the link to SeaRays site - owners manuals are second section down..
https://global.searay.com/page.aspx/pageid/162289/Owners-Resources.aspx