Moving battery

[LCRTrackcar]

Hay all

I'm track prepping my road car for being a track car. It's a FWD Seat Leon Cupra R which is not ideal but my first track car forray so it's what I'm using.
I have coilovers and when I'm a bit better at driving the car I'll be looking to get the car corner balanced.
Thinking of this in the furture where is the best place in my car for the OEM battery? I'm sticking with OEM just now as there is lots to be spend and OEM will do just now.
Am I better to put this in the passengers side foot well to try and spread the weight of be a bit?
Am I better to put this as central in the car as possible, like behind the front seats on the floor?
Or is the spare wheel well as far forward as possible the right place?

Thank you in advance, sorry it's a bit of a mundane question for all you very technical guys but thought this was a good place to start.