I have my solenoid box remotely mounted. Mainly because it came with the box mounted directly above the drum, and when you spool 100ft of cable on, it is really close to the box. I was afraid that 1 loop in the cable while winching and it was going to tear it off.
12ft is more than enough to reach to where ever you want to mount the box. The entire Jeep is only 16ft long. I think my winch came with 8ft battery leads, and they are too long.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...