I've got a SkySafari & use it with a SkyFi 3 unit that connects beautifully to my Celestron CGX hand controller via USB. I'd like to try it with my iOptron iEQ45 (this is a pre-PRO model but with the 8407 hand controller). So, here's the question: what's the correct way to connect the SkyFi 3 to the iOptron mount? I apologize if this is dead obvious, but I found conflicting info in various places on the 'Net.
Do I connect the SkyFi 3's DB9 serial port to the RJ9 hand controller port (as per this illustration--this is the serial cable that came with the mount and is mentioned as being used to upgrade the hand controller firmware).
Or do I do it this way SkyFi's DB9 port to iEQ45 mount's DB9 port (again, cable is supplied with mount for upgrading the firmware on the mount's main board):