Firewall for Trunk w/ Nitrous and battery!

I picked up a light race battery 13.5 lbs (Dry cell Dyna-batt), same as bottle empty but moper you got me thinking about it and I changed my mind, I'm putting the battery back up front on the right (in line with the NO2) I figure it will help balance driver weight better, may not improve 50/50 or traction, but it will save a few lbs and some expense- no firewall, no extra cable, no box, no kill switch = $160 savings plus gotta be at least 10lbs right there.