i think you will find it's easier to just move the battery to the boot.. making a mount for the battery where the stock airfilter is would be a bit tricky i would think.. plus you can use the room where your old airfilter is for a catch can
this is the only pic i have of mine i think. it's a little hard to see. but all i did was make a battery tray and bolt it to the rail in the same bolt holes that the air box bracket came off... alot easier than moving it to the boot