Lay the brick behind the battery

Lay the coiled cord toward the front

Insert J connector and lay the cord snug in the front corner along the weatherstrip

Draw the extension cord same along the other side and close the hood

Side view ready to plug in

The extension cord shown I believe was #16 wire. After close to an hour the wire was fine but the connectors became very hot. It is an old cord and probably worn connectors. My #12 wire extension cord fit the slot just fine so I have to recommend the heavier cord. I have used this HD cord for 6 hours continuous with no heat issues.