I've changed 6 battery cable sets on Marauders over the years. The cable is the exact same as the MGM one. Just carefully release the plastic tabs. They are basically zip ties around the cable so I use a small flat balde screw driver to release the lock tab and remove the plastic reatainers. The one up by the alternator is just taped to the harness.
The nut on the back of the right head is 13mm wide flat nut. I found a flat ratchet works great to get to it from the underside of the car. You have to do it by feel.
Pre bend the new cable assembly to roughly match the old one for ease of installation. The only area to watch out for is where the cables run under the right head along the block right near the starter. Make sure the cable does not touch or is near the exhaust manifold. (By the way, this is the area almost all the MGM/Marauder engine fires start at.) It's tucked up next to engine pretty close in this area.
Use care when removing the 10MM nut on the end of the power junction box (one end of the red cable attaches here on the engine side of the big black power jucntion box). It's a locknut and it's easy to break the plastic. I hold the end of the old cable with a pair of pliers and then loosen the nut after spraying some penatrating oil on the nut.
The wires only connect one way, so no chance of making a wrong connection.
His: Blue w/Light Flint Born 02/05/03 (Wednesday)
6674 of 7838, Color sequence 102 of 327
1 of 111 Without Heated Seats
6 CD Changer in Trunk
Locking Lugs
Trunk Organizer
Real Oil Press Guage w/MM Face
Marauder Side Emblems
Rear Bumper Inserts
Nephews: Blue w/Light Flint
Born 02/05/03
6673 of 7838, 101 of 327 Blues 1 of 111 Without Heated Seats
Cars purchased 7 years apart, but are only 20 VIN numbers apart. Sequential units on the assembly line.
Hers: Black 300A w/Charcoal Born 06/25/02 (Tuesday)
2011 of 7838.
Locking Lugs
Trunk Organizer
Real Oil Press Guage w/MM Face
Factory Alarm
Marauder Side Emblems
Rear Bumper Inserts
#4 (Pound Rescue Marauder) 2003 DBP/Light Flint
120 of 328 DBP 1 of 217 with heated seats.
6705 of 7838 2003's
Built Friday 02-07-2003
Bought 09-10-2012
#5 2003 DBP/Light Flint
136 of 327 Blues 1 of 111 W/O Heated Seats
6741 of 7838 2003's
Built Tuesday 02-11-2003
Bought 05-06-14