Hey there, was going to install a new battery, but I'm pretty sure something is wrong with the wiring. Negative looks OK with its extra snap-in connector, but there's this white snap-in that I don't see a place for, and a look single copper wire that I think goes to the positive terminal. Thanks for any insights!

 

Nvm, got it working. Now the hood sensor won't let me lock the car. Always something!

 

The red/blue wire is the positive feed to the bms unit on the negative terminal. That wire has a "fuselink" built into the wire.

 

Thank you!