Those 4 set screws (or bolts) will allow the milling head to be raised clear of the machine. The wires to the milling head will be to a safety limit switch (to prevent the machine belt cover to be removed with the machine running). It will likely be in series with the safety switch on the rear cover of the headstock
The whole thing only weighs 164kg, so with the milling head, chuck and the tailstock removed, the rest should be easily moved by lifting with the 4 handles in the bed casting.