I think it would probably be adequate to handle this as someone suggested to handle the ADRs on the Abnormal V Alpha Prot OEB: Switch ACP3 to whoever is handling comms and leave the FO speaker to max, as pointed in the video.
Uplinker: anything can reach over to the Capt side with a long enough cable
But I can’t see a reason to do this as ACP2 is also inop as pointed by pineteam. You still have to switch ACP3 to someone.