You will also need to supply power to the G2. For HDMI consider getting an expensive HDMI splitter and a couple of more short HDMI cables. Pull out the BluRay player and unplug the HDMI Cable. Plug that into the output port on the HDMI Splitter. Then from the output port on the BluRay and the Sat recv. plug those into the input ports on the HDMI splitter. I had one from Amazon that was a three into 1. I put a longer thin HDMI cable on the third input so that I could plug in my iPad. Typically they will auto switch the input to whichever one is active.
Model I had was a Kinivo 301BN.
Short term simply unplug the HDMI cable from the BluRay and plug it into the Sat RX.
2020 Classic 33 Twin, 2019 Ram 3500 Longhorn, ProPride