Sea Ray

Welcome to the forum.

The linked Owner's Manual shows the mounting of the trolling motor and the batteries for that option.

https://bbg1.my.salesforce.com/sfc/p/#E0000000Z21E/a/44000000LUdC/LXqqauH1D3FmdEgHAUf.1touIu3R.nVzg0DqrMp3LxI

Thank you. I did see that diagram on page 18 but was still confused about where they are exactly. Are they in the ski locker area?

My speculation looking at the image on page 28 is that the factory location for those batteries is under the bow bench cushions, based on the shape of the hull in that line drawing image.

https://boats-from-usa.com/sites/default/files/boats/2017-09/28/147762/sea-ray-spx-210-ob-1696165.jpg

Based on the drawing text I would speculate that the factory battery location is under the helm station and under the opposite console.

https://prodwebassets.s3.amazonaws.com/boats/6054821/6054821_20181114061116586_1_XLARGE.jpg

The best option is to start carefully removing parts and exploring. Whenever I do that on my boat I take LOTS of photographs that are frequently very useful in the future.

Note that adding this system MUST be properly installed or the safety of the boat will be adversely impacted. The installation is not trivial, will require tools and skills above the typical handyman level.

There are pages throughout that linked document that will be useful for this project.

One thing I liked was the connector that maintains the batteries as isolated 12V devices, but the connector joins them in series for the motor. That configuration makes charging the batteries easier to effect.

Thanks for your help. I appreciate it. I'm going to be up at the boat tomorrow and will be doing some "investigative" work.