Got the battery installed in the trunk. Put it right in the center as that was the easiest to mount and drill holes ect. Also only added 2.25lbs of cabling
Had to figure out the new weights from each area of the car.
Front :
-Stock Battery/Trace/Holder -29.75, + .5lbs underhood connectors = -29.25lbs
Middle:
+ Cable 2.25lbs
Rear:
Shorai Battery/Mount/ Negative Cable +6.25lbs
New car weight 2342lbs
Stock battery/tray/Tie bar
Connection point I made out of and old Rubber Exhaust hanger

Connected those to the stock under battery bracket
Weight of the 4gauge cable I had leftover from stereo installs

- Minus what I didn't use
Weight of the Battery/Mount/Negative Cable
Installed in the trunk, used the spare tire mount for my ground point, Idled the car for 10 mins everything seems great!
In summary I was able to Take alot of weight off the front and only add a few total pounds, put some over the rear tires!!