Just to give you another idea.... I left the S1 up in the headliner. When I need to access the upgrade cable, I pop out the light, remove a couple of torx screws, and can pop out the cable. Takes about 2 minutes to get to the cable and about 3 to put it away.

A great mod!!

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-'13 E93 M3 Cab, Interlagos Blue, Carbon Black leather, DCT, all options, and fun, endless fun!
-'13 X5 35i M-Sport, Carbon Black & Cinnamon, Dinan Stage 2!
-'15 Toyota Sienna Limited Premium AWD, Silver & Grey, Nav & BluRay, and less lame than the 2011 it replaced
-'07 Mini Cab S, Laser Blue, 6sp, endless fun that ended (sold)
-'04 X5 4.4i, loaded, loved, modded and sold