Will not start condition ‘08 4.8 with error codes

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Ok, so my 2008 X5 4.8 won’t start. Not a battery issue, that’s been disconnected and charged fully to make sure (although I’m at 11.86 volts, which seems a bit low, but the starter isn’t making any attempt but i will test the battery in case).

I’m getting power to everything but when the start button is hit, I hear the relay trying to activate the starter, but the starter doesnt go. It also seems the brake petal is very firm.

I have 3 codes thrown (in addition to some random dash lights):

D904 Kcan wire fault
A0B4 Engine start, starter operation
A0B2 Supply, terminal 30E

Anyone have success differentiating between a bad starter and a bad connection at the battery with the safety terminals? Does the A0B2 code imply it’s the safety terminal connection?

Insight would be appreciated. Thanks!