air bag light

[smithy]

hi all still working on the berlingo,clutch and diff oil seal replaced ,gearbox refitted but whilst doing this work i thought i would try to repair the indicator stalk ,i removed the airbag etc had a play with the stalk refitted it all and now the airbag light is on all the time i have removed the airbag again it all looks ok ,there is a blue plug with 2 yellow wires near the switch gear but i cannot find a home for it.
Any ideas would be welcome, thanks smithy:

[smithy]

solved it. the blue plug went into the back of the switch gear into what looks like an earth clip, what it may be is part of the can system , when you fit the plug it opens the link and allows data to flow.