Just wanted to add an update. Was able to add grounding bar without issues. Hard to see it in the picture. Might move it one day so that its easier to verify if grounds are loose.

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Thanks for the feedback. I think I will be fine. Good point on adding something to the screws n will consider it in the future. I guess worst case or safest bet I can just glue a HDPE or marine wood to the wall then screw into it

Yes you are correct. Seems like if I aim high I will end up in the backsplash drain area. I took a picture from the inside. Looks like I should be ok if Im near the middle. My power cables are secured by fir tree restraints near the bottom on the back.

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Woops sorry forgot. I have a 2018 Lund Impact 1875xs.

Back of battery compartment

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Gravity drain doesnt work unless the boat is moving when in the water.