just been an taken another look
looks like just the drivers seat had some wires cut when it was removed and its the 2 yellow ones, which i know normally go to a plastic connector which in turn go into a connector coming from wires in the floor. pretty sure the 2 yellow are the air bag wires.
i remember not being phased by what was required when i bought them. Also just noticed that the little tray thing on the drivers side is cracked and broken. Again not a big deal if you have a set of seats already, or easy to get from a breakers, lots of zeds being stripped on ebay at the moment. i may even have one somewhere in the garage i'll take a look.
still an easy way to get some frost grey seats in great condition.