The HDMI cable from the Sat receiver to the TV should provide audio from the TV speaker itself. If you want the audio on the onboard RV speakers you would need AV / RCA cables from the receiver to the input on the radio.
Progressive Industries EMS - Hardwired
Marineco Detachable Shore Cord
CRE 3000 Equalizer / Wet Bolt Kit
Equalizer 4 Point WDH
2016 Ford F250 6.2 Gasser
Air Lift Rear Bags w/ On Board Compressor