Alternator/Power Cable

[Jim-Bob]

I've relocated my battery to the boot, and upgraded all the wiring to 4 AWG, just got to connect up the alternator to starter motor cable now.

I've run the 4 AWG round from the starter motor to the alternator and connected both the 4 AWG and OEM cables as the starter motor end whilst the bay was fairly empty, to make like easier i have both options

Now i'm wondering will it be safe to fit both the 4 AWG and OEM cable to run from the alternator to starter motor? Or whether i should just use the 4 AWG cable and blank the OEM one off?

Any advice will be greatly appreciated

James