It might just be easier to remove the plastic cover. If you remove the passenger side strut bar it should come right off. I recently did this to unplug the o2 sensors when doing a DP install. Literally takes an extra 5 minutes. Just be sure you have an E18 torx to remove the strut bar, it's not common.
2015 AW M3 (MINE)
2015 GSM X1 (HERS)