battery foxbody

My fox was in the middle of having the battery relocated to the trunk when I purchased it. I made a batter box for the new battery and mounted in the trunk of my notch. I have a 1/0 power cable and a 1/0 ground cable ran into the trunk. The power cable is blue and this goes to the starter...

Looking to replace my old group 58 battery. Was doing work that required my doors to stay open earlier today and it drained my battery after less than an hour with just the dome light draining power. The tray looks like it has room to accommodate a group 65 battery. Thinking of giving it a try...