Here is a pic of my current one (left) and the one in question (right)
They are both from the same trainset (4032) but the casing is all chewed up where someone has got in. There are no metal sleeves for a connection 
Damo, my advice (for what it's worth) is to put the "one in question (right)" in the dustbin ... along with all the wires!
Also, while I am here, I could do with a quick lesson on the transformer. My main question is what is the pins for on the left hand side for? 
The pins on the "left hand side" labled 14V~ 5VA, are for accessories. If you had some 14 volt electric street lights that you wanted on when you were running your train, you would plug them in there. Also if you had some electric switches (turnouts) that needed constant power, you would plug them in there.
The only real difference between the top connectors and the connectors on the left hand side is ... the top connectors supply variable voltage that's controlled by the knob to vary the speed of your train ... And, the left hand side connectors supply constant voltage for any accessories such as lights, switches, etc.
You can plug your meter into the top connectors to check your voltage output which should vary between 0 to 14 volts. (Or, your side connectors which should supply a constant 14 volts.) BE SURE TO CONNECT THE RED WIRE OF YOUR METER TO THE RED CONNECTOR OF YOUR METER AND THE RED CONNECTOR OF YOUR TRANSFORMER ... AND, BE SURE TO CONNECT THE BLACK WIRE OF YOUR METER TO THE BLACK CONNECTOR OF YOUR METER AND THE BLACK CONNECTOR OF YOUR TRANSFORMER!