It makes zero sense to put the battery there. It's basically the same location as stock, except not in the engine bay. There's no box surrounding it to protect it... I imagine that your insurance company will be thrilled when a 5mph tap of a pole turns into a flaming explosion.

Why do you want it there? 99% of battery relocations are to the trunk/rear of the car or the middle, which helps with weight distribution. Even if you're shaving your engine bay so you want it relocated for purely aesthetic reasons, put it in the trunk so it's protected.