I just bought the AS GPS HS sensor for the bow locator which is an 899ci. I am trying to get it set up for checking the mounting position of the puck. I can't see any where in the menu system to select the external antenna over the internal one. When I do the accessory test it shows GPS connected. The GPS diagnostic view shows that the internal antenna is selected. On the network menu there is no option for the external antenna. Can't seem to find any mention in the manual and waited on hold with CS till they closed up and went home. Anyone know how to do this?