Charger mounting location question

I'm working on installing a 3 bank charger into a 2019 Tracker pro 170.  The boat has 3 batteries, so all of the available space in the "battery compartment" in the bilge is taken.  That being said, I'd like to install the charger in the bilge to minimize cutting holes to run wires.  There is room to install a 3 bank charger on top of the gas tank, or between the tank and the bulkhead to the next compartment, however, it would be a tight fit and force the mounting location to be the aluminum divider between the compartments.  So, I have three questions - 1) is there anything wrong with affixing the charger using adhesive to the top of the fuel tank? 2) is the aluminum Tracker uses strong enough to screw a noco 3 bank mini charger (about 8 lbs) directly to; and 3) am I wasting my time because a better mounting location exists?  Photos for reference:

Charger could go here on top of the fuel tank: 

Or roughly here on the aluminum bulkhead.  Less venting available, but at least not sitting on the tank. 

Thanks!