[ken_yap]

I'm looking at 3.0 at the moment, hopefully 2.2 is the same. The "Attached to" dropdown should be set to Bridge Interface, out of a choice of five: Not attached, NAT, Bridge Interface, Internal Adapter and Host-only Interface. Previously a bridged interface was described as HIN in the documentation, hence the confusion.

Once you have chosen that, the "Name" dropdown gives you a choice of eth0, eth1, etc up to all the physical interfaces you have on your system.

That's all there is to it.

If you don't find it in 2.2 perhaps you should update to 3.0.