Steve,
My kit came with a CAT6 RG45 terminated wire able to plug directly into the PoE, thereby eliminating the need and additional draw of the Starlink WiFi router and the Ethernet adapter.
I was able to get a connection (not perfect but workable) using a small Gb NetGear Switch between the HP antenna and the PepWave MAX-BR1-PRO-LTEA-W.
Static: IP of 192.168.100.99
Mask: 255.255.0.0
Gateway: 192.168.100.1
I have not tried your solution for the Health Check yet.
Have you tried this direct connection and if not, why?
Thanks,
Pierre