Then the insulation was pushed away, the spacer inserted and the washer was put over the shank and everything tightened up with the shank's nut.

A special wrench tightens the faucet to the outside of the shank.

And the beer line connects from the rear. The beer line connects to the tap, as well as the CO2 line from the tank’s regulator.

Nope, we're not ready yet.  That's still the empty keg in there and we need to make sure we're defrosting.