Always put fuse closest to battery, especially if your running 4 wire, i would double up. I use 1 wire when installing subs. I have seen plenty of cases where bad install, not fused up front , year later power cable rubs metal and then call the fire department. That fuse up front will stop this
Use a 120A fuse near the battery in this case..
Use a 120A fuse near the battery in this case..