Interfacing Celestrons StarSense to a Raspberry Pi

[MikesStars]

I have a StarSense system fitted to my Skywatcher EQ5 Scope and have just completed a bit of hobby electronics with a raspberry Pi that collects and displays GPS time and location. It would be really neat for me if I could use the time generated on my Raspberry Pi as input to initiation of the Celestron StarSense system each time I switch it on instead of feeding it in manually (even neater if I could input Latitude/Longtitude as well but will leave that for a later project). I am aware or have read that StarSense does have the ability to take input from the RTC on some mounts so this aught to be an achievable aim. Could anybody help me with or point me to:

1)  How to make the hardware interface between the Raspberry and StarSense; I assume that this could be as simple as taking a USB from the RPi and plugging into the spare AUX-3 port on the StarSense hub but would like some reassurance on this connection so as not to do damage.

2)  What protocols and formats do I need create for the StarSense to request time and the RPI to send the RTC time.

Many thanks

Edited July 4, 2020 by MikesStars
correct typo