BMW [Crank But Won’t Start ] CHECK THIS FIRST!!! Terminal 15 or Terminal 87

BMW N20 2.0 engine, perhaps other models as well.

The battery on my 2014 X.3 was low and I attempt it to jump it  in a rush, but didn’t pay much attention and ended up, jumping both positive terminal.
For some reason unknown why there are 2 “Positive Terminals” next to each other;
One has red cap, the other one has a black cap which can be easily confused as a negative terminal which is what I did and blew the fuse on the top of the battery.