There is no need for the 30amp in-line fuses if you are just going to use this modification as a kill switch as in the schematic. I used wires with in-line fuses because of other things I'm using the two lines for. The kill switch mod only requires one wire to the battery line. The fuseable link is still in line and being used as it was before. This mod taps into the line from the battery going to the fuseable link before it gets to the fuseable link. This way, the fuse is still in line and maintains the integrity of the system.