thank you for your responses,,,which help,,,,great forum...…
I decided to send an email to the stellarmae customer service (Jasem Mutlaq Ikarus technologies),,,,and I received a response in approx. 2 hrs,,,,very good service. Here is what Stellarmate (Jasem) had to say regarding my question,,,,
Regarding iOptron cable, you assumed correctly. The 4P4C RJ9 plug goes into the HC while the USB end goes into StellarMate.
Regarding SkySafari, no need to plug into anything as StellarMate also acts as the WiFi here. Just follow the instructions and make sure you have the SkySafari driver selected in your equipment profile. Then once you connect from SkySafari on your iPad/Android, you're good to go. Now your tablet/phone needs to be connected to StellarMate (over WiFi or Hotspot) for this to work
So if anyone else was wondering about connection tada. hope it helps