Looks like yours is missing the lead/ lampholder.....mine came over the same way mate.
The cover had broken/ come off on mine allowing the lead to have fallen behind the dash trim.... but the lampholder was there. hopefully yours is. It just glowed a bright white with no cover, which was far too bright for driving at night.
To access it, pull the curved bit of trim with the 12V socket in. Just pulls down / forward. You should be able to see if you have it hidden away in there, or if it has been completely removed. If its not there, anyone breaking a DC5 may have the little cover, but they may only sell it as a complete unit. (not expensive) .
A new one just plugs in to the loom, and away you go.
Its a nice touch even though it is only noticeable if you put your hand under it in the dark, or a drink can etc. Other than that its like its not there.