Looking for opinions about a dual battery set-up in 22 foot Sea Hunt. One battery located under each side of the rear seats. Current set-up doesn't have battery boxes or even post covers for the batteries. Looking at rectifying that issue ASAP. One side is fairly open with room to mount a battery box the other is pretty tight because it has the oil reservoir, fuel filter and battery switch. Is it worth the trouble to cram in a battery box or just go with the post covers?