Battery Disconnect Switch

I have one like this on my Pontiac street rod, need to get one for the Valiant.
Coming from a previous motorcycle heavy hobby I have a few Battery Tender float chargers. Usually keep one shuffled between the Pontiac and the Valiant, others on my mower & generator.
Amazon.com: Ampper Top Post Knife Blade Master Switch, 12V / 24V Battery Disconnect Switch Isolator Power Cut Off for Marine Car Boat RV ATV (Negative): Automotive