This Kicker 09FHA/FHS fuse holder features one 1/0 AWG or 4 AWG input and one 1/0 AWG or 4 AWG output to accommodate your needs and all-brass hardware for durability.
This fuse holder is included with larger-gauge Kicker amp wiring kits, but I picked this up as an add-on when I installed a 2nd amp in my system and went from 8-gauge to 4-gauge wiring overall. But this could also handle 2-gauge and 1/0-gauge cable too.
There are two types of connectors depending on whether you're using AFS or ANL fuses (I have a 100-amp AFS fuse in mine), they're pretty easy to connect. The large openings and set screws make it easy to get your wire into each end, and it holds pretty tight for a good, solid connection so you won't have to worry about a short at the fuse.
What's great about it: Accepts large gauge wire, AFS & ANL fuses
What's not so great: Large size may make it hard to mount depending on your car