Here is the post that had the same issue as mine and he states it was on drivers side.
http://www.xoutpost.com/bmw-sav-foru...-no-crank.html
Either case.. i should be ok with leaving this 4 gauge ground wire and it should be ok yes?
Update for anyone who has this issue in the future:
As stated before, the ground was the issue so adding a chassis ground solved the no crank issue. Turns out the battery was pretty drained out so i charged it overnight and got it load tested, it tested good so nothing is wrong with the battery.
The AutoZone employee also tested the alternator and said one part passed but other part didn't. I'm not sure what those parts mean but basically i was told the alternator wasn't charging the battery like it should be. No issues since all that and it starts right up. Maybe i will need to get the alternator rebuilt at some point if this happens again.
Next step is to replace the original ground wire when i have some time.