So I’m looking for guidance on what to purchase when it comes to a 24v battery maintainer and shoreline plug. I’d like to be able to plug my hmmwv into an extension cord to keep the batteries charged. Tired of removing the seat and disconnecting battery terminals. I don’t have any accessories. I’ve seen and like the idea of a shoreline plug at the rear where the hole is for antenna wiring. Also wondering if anyone has been able to modify a slave cable to make this happen.