Roonbridge / Raspberry Pi3 / NAD T75HD via HDMI

I purchassed an additional PI3 to use it as another zone…

Configuring the new PI3 as reading the Roon on PI tutorial for beginners, I noticed that if I do not disable the PI3 on board audio as stated below… HDMI output shows as a zone on ROON CORE…

…Bad news is , but the unit can not access the WIFI dongle and connect wireless, leaving the zone to only ethernet.

My question now is… is there a way to dissable blutooth on the PI3 without dissabling all main board audio? so I can have WIFI conectivity and HDMI digital output?