Airbag Light

[MiiTCH]

Ive changed my interior to the half leather GTI6 interior, and when changing it, i noticed that the new seats only had 2 plug on the bottom, so there was no where for me to plug the earth, but on my old seats there was a bit where i could plug all three...

for a while my airbag light was flashing, then i went to france in my car and it stopped for about a month almost, then recently its come back on :? when it stopped flashing, the earth still wasn't connected... sometimes the light will be off, and as soon as someone sits in the seat, it will come on

im sure this has been discussed before, but i need a little help hock: