The AT-100 ProII is designed for _fully automatic_ operation.  If you can figure out how to get 12 volts DC (either from the IC-7000 "Tune" socket, or from its 12-volt power supply), and feed it to the AT-100's "DC In" connections, you should be good to go.  

If you need a 12-volt power cable, LDG recommends using "cheapham.com" -- this item:

Good luck! --

.     Charles / va7cpc