I have both items and can't seem to figure out if I have all the pieces. From the pics below, it doesn't appear the ATAS will fit on the mount (with the pin in the middle). What am I missing? Any tips/pointers will be highly appreciated.
You do not need to buy a whole new mount (about 70 bucks). You can get the diamond model C2135sma antenna base and cable only. It is a uhf type base with 13 feet of cable. Give diamond a call if you need help.