I have the M1 and the new Spectrum cable box it only has a HDMI port. not sure what to make it work.
I see you are trying to setup your M1 and the image you shared only shows an HDMI connection port. The way to continue using your HDMI cable is to use an HDMI to Component Adapter.
I will be posting a link on how to connect this adapter into your setup.
Sling Media Moderation Team