Zippi,
the ignition is on the exhaust side of the plane, the switch/ and ernst charge jack are on the carb side. i put thin foam on the floor, then fished the needed wires and plug wire through the firewall, put tank in and secured it, then put the ignition battery in between the ignition and the switches. after all that in one head scratchin manuever, i then packed it in foam after securing the battery to the switch harness.

Eric