OK so I have my 'Haynes Repair Manual' here and it has me taking things off the inner fender well to do this.  I was under the impression the process went 1) unscrew old antenna mast 2) screw on new euro antenna.  3) drink beer.

Can someone provide insight please?

X2

thanks for the pic.

you'll probably have to simply go into the trunk and work from there. that's all i can give you.