Thanks for the video, the pictures and the instructions. Just replaced mine in 20 minutes and working perfectly now.
The part was only £8.99 on eBay and arrived next day. So no soldering required. My fabia is an early mk2 which doesn't have a glove box lid, but the instructions still went a long way to helping me.
The 3 torx 30 screws holding the airbag in place are pretty tight and for good reason. A socket set with a 30 torx bit made short work of them and a magnetic pickup tool helped.
Hardest part was getting the airbag cover to click back into place in the top of the dash, but still not too bad.
Took the advice of turning the ignition on before reconnecting the battery in case the airbag went off.