
The seller has contacted me to correct my order. Apparently my blocks could be faulty! The seller replaced my units and the new units arrived with the screws already protruding so all that was required was to connect the wires and tighten the screws. Like those bought elsewhere. Unlike most sockets, the only option for them is to insert the wire straight (plug) into the back and then tighten the screw - unfortunately the instructions aren't too clear as that's the 'only' option! Once removed, the bottom screw will NOT be reinstalled.

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