Subwoofer placement for beginners

[Launchman2000]

I have 2 10" subs to put in the boat. I was thinking of cutting holes on both sides right below the storage shelves. (black circle in the picture)

I figured I could adjust the sound by packing the inside around them with some type of acoustic insulation. I dug around on the forum and could not find anyone who did the same thing, Most everybody else puts them under the driver's console in a box, but I wanted to leave that open for storage.

Any suggestions here? Would the subs sound OK?