You can use an ammo box (I did ), or the orange box dude listed below, and these: https://www.amazon.com/MySit-Waterproof-Adjustable-Plastic-Protectors/dp/B09VGVF3JS/ref=sr_1_3?keywords=wire+grommet+waterproof&qid=1666707391&qu=eyJxc2MiOiIzLjA2IiwicXNhIjoiMS43NSIsInFzcCI6IjAuOTIifQ%3D%3D&sr=8-3.

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Pretty simple to add fuses, switches, chargers etc. to them too.