There are two different ways to add a second display to the NAVpilot 711C system. The first way is to connect a second display directly to the first one. To do this, purchase part number FAP7011C-A (this part number includes the FAP7011C display and a double-ended cable). The terminator from the first display would be removed and reinstalled on the second display and the cable would connect between the two displays. This is called daisy chaining. The second way is to connect the second display directly from the processor Control B port to the 2nd display and install a terminator. If this is preferable, then the FAP7011C part number should be purchased (this part number includes the FAP7011C display, a single-ended cable and a terminator). Either will work fine, it's just a matter of which connection is preferred.
Bottom line:
FAP7011C-A: Connects both displays together by daisy chaining. Part number includes display and double-ended cable
FAP7011C: Connects second display to processor's Control B port to second display. Part number includes display, single-ended cable and terminator.