update 6-22-2019:
This will also work on the TinyHawk S. The pins for 5v, ground, video, and aux2 are the same as original TinyHawk. Also,if you are interested in how to add an XM+ RX with RSSI, then check out my step by step video on how to do it. It covers flashing, installation, and complete betaflight setup.
Watch here:
https://youtu.be/9bt3AfnBNdE
And a range test video of 300 meters on 1S .
Watch here :
https://youtu.be/Pddd2FhipUo