questions about battery disconnect wiring

@67Dart273
I was directed to this thread by @Mattax. I’m going to start gathering parts for an NHRA legal trunk battery install. It’s a 74 Dart Sport with stock wiring, alt., etc. I know this is better than NHRA’s method, as there is no hot wire running to the front when the CO is thrown.
I’m not an electrician. But I can duplicate this.
Two questions (so far)-
-The 4 ga fused wire. A fusible link? An inline? What rating? I think a 4 ga fusible link has a specific rating?
-The CDR, will a cole hersee 24059 or 24106 work as @crackedback suggested?