Shark fin is usually colour coded, mind you you might get away with out painting cos your already black.
I wonder if you have to run the cables all the way to the front of if there is a connector?
+ don't tighten the aerial nut too tight, my m8 did it on his mk3 and left himself a nice little bowl for water to collect in.
Mine works OK with the antenna attached to the top of the MFD2. Did you get a special windscreen as one of your toys ?