Proxmox Without Ethernet

Hi, I'm a newcomer to Proxmox. I have 1 Proxmox machine set up taking up my only ethernet port but I would like to make a cluster! I have a MAC Mini, and an old dell PC which I might be able to sacrifice my ethernet for as the wifi driver is broken. I'm hoping anyone could guilde me through setting up a ProxCluster without ethernet?


Thanks,
Aarush