I'm in the midst of this swap and I'm at a loss as to how to disconnect the two cables from the back of the MK3 Nav unit (blue and purple). There's so little slack on those cables that I can't even get a good look. I'm guessing something has to happen to the black plastic "clamp" piece ...

Pics and description on how they come off would be great! I've tried searching and haven't been able to find anything.

Thanks in advance!

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2002 X5 4.4, Stahlgrau Metallic, 55k miles
Sport, Cold Weather, Rear Seat Heating, Rear Climate, Nav, PDC, Electric Rear Seat Back Adjustment, Rear Shades
Current Mods: M steering wheel, Mk4 Nav Retrofit, Intravee/Alpine/SpecDock, Cosmos Schwarz Interior Trim
Coming Soon: Hood Protector
Wish List: Aluminum Running Boards, Rear Backup Camera, 20" Staggered Style 87s (Black), Hitch Retrofit

1996 318ti, California package (plus tons of mods), Aqua Metallic, 237k miles