Always glad to share! Unlike many, I actually like Electrical and Electronics. Diagnosing and fixing challenges and works my mind and God knows I can use that at my age.
Oh HELL no! I would never subject a battery to all that heat coming off the radiator, it would kill a battery in one summer for me. And I also installed to the storage box I think you are talking about so there wasn't room there anyway.
May 2nd battery is behind the insulated firewall I built, just next to the glovebox. I fabricated a battery tray and used a rubber hold down strap. Works excellent and fits the larger U1 35AH AGM Battery like this one...
This Duracell Ultra 12V 35AH AGM battery is great for mobility and wheelchair, backup or UPS systems, solar, healthcare, general business, schools, assisted living, contractors and property management. This battery offers Absorbent Glass Mat (AGM) technology provides superior performance.
www.batteriesplus.com
I can get some pics in the next couple of days, I need to tear in there and install a quick connect for my jumper cables so I can use my 2nd (bigger) battery to jump start all my RZR buddies