vSAN ESA Witness running on Synology NAS

I am currently trying to setup a 2 node VSAN cluster in my homelab (VMWare 8). I was hoping to run the vSAN ESA Witness appliance on my Synology NAS.

I have got the appliance to boot ok and can login but I am struggling to get a working network connection on the appliance. It is not detecting any of the network adapters that I can choose in Synology virtual machine manager (virtio, e1000, rtl8138)

Does anyone know a workaround for this?

The e1000 nic works last time I tried it. But it has been a long while.