I have a low profile, European automotive SLA battery, clamped to a piece of wood, under the hood.The low profile battery has recessed terminals, and a cover at least on the positive terminal, to maintain isolation from the chassis.
It's a low tech solution, but the 200 watts worth of aviation landing lights that I have for headlamps demanded a brute force solution.The horn is pillaged from a Toyota, and is by it's construction,is also isolated from the chassis.
RJ Kanary Bandi Bros. Inc.
Member TRNi Since 1998
ASE® Certified Master Auto Technician