Sync a cube in UNet

So I'm trying to learn the ropes of UNet after years of using legacy networking, I'll be looking into other solutions soon after I give UNet its fair shot

I'm used to the minimal component setup and prefer doing it all through script. I've been referencing the MasterServer example and what I can from the documentation.

I have a basic scene setup:
NetworkHandler script on a gameobject
CubeUpdate script on a cube, along with a NetworkIdentity checked as 'server only'

This cube needs to...

Sync a cube in UNet