Made battery box for in back of pax seat. Actually the holder came with the battery, a little heavy but.. The main battery relay is mounted next to it. The engine fuel and ignition and primer will come off of this before another relay for the rest of the electrical. The other relay is on the cabin side of the F/W A six position fuse panel on the F/W will serve the fuel and ignition and primer. Set up 4 AWG wire and wire for master switch. May change main feed wire and go along the left rail, away from VHF antenna