Thank you gents, as always for your replies.

Eddie, thank you for the suggestion, I will do what you suggest as a last resort.

Mikey, I hope the pic below is of help to you. It does not look like T connector to me, but again, I am a bit of a nincompoop as far as electrical stuff goes.

Ok, Mongo, I will send a PM. Thank you for your offer, and the beer goes without saying!

Below are more pics of the connector.

Mitsu NA weren't able to help me either, as they said all the part information is deleted from their system after 10 years. I told them that was not wise, as there were still many of these on the road, and even more in diesel form, all over the world. They gave me Mitsu's number in Japan as a last resort. The woman then proceeded to tell me about some incentive to buy a new Mitsubishi, to which I replied, that there was nothing they made today that interested me in the slightest.