Re: Tell me if this is good or dangerous...
Other really small batteries such as alarm and emergency lighting have a tab which goes into a crimp-on female connector on the wiring harness. The better ones have different sized tabs on + and - so that you cannot hook it up wrong. But as BB said, make sure that any point at which you will routinely disconnect the system uses a polarized connector. Get the others wired up properly the first time and then never disconnect them.
Originally Posted by BB.
Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.