Air bag light on

[Busboy]

All of a sudden my Air bag light has come on and stays on and does not go out at all even if the ignition is switched on and off.

I have read through a couple of old threads on the issue and I have located the two yellow connectors which are clipped in to a flat bar running ender the seat, now I realise that the connector with the yellow sleeving is for the pre-tensioner, so the other must be for the air bag, ( see pics).

now I can't see how to separate the yellow connector, I have put the seat right forward and am looking in from behind, but I can't see how the connector can be separated as it is not possible to get both hands in , surely the seat won't have to come out will it?

Any advice on how to go about this job most welcome