NHRA fuel cell rule clarification. Under car cage/mount

Blucuda413 said
BTW, outside the confines of the body is the external limits of the body shell and all floor is within those confines. Therefore going through the floor is not considered going outside the body confines

Its an aluminum fuel cell. I am mounting it literally under the trunk, with a trap door to the filler, flush in the trunk floor.
All you would see from the top side is one of these.

I planned on mounting it somewhat like a truck guy would