Power Supply Unit Woes

[Thomas Harte]

        Now that the connection between the end of the power supply unit that 
plugs
into the SAM and the lead that runs from it to the power supply is almost
severed anyway, and because I couldn't find anything about it at the SAM Coupé
Scrapbook, I am wondering - if I were to cut the wire and try to resolder the
end slightly lower down, which coloured wire would go where?

                -Thomas