Antenna base removal on fender swap

How do you remove this part??? the donor fender I got has the coax cord cut... I want to get this stripped and ready for paint and need to remove my old fender..

Any help would be great!

Pics of said parts...










Any help would be awesome! I dont know what I am missing but its a got me scratching my head...

I can't see your pics, but I'm guessing the PDF in this FAQ post should explain what you're missing.

on the top there is a litte bllack thing that has notches on it. all you have to do is unscrew it...

PDF worked out great! thanks a lot!!