Volkswagen: 2000 passat Air bag light staying on, rear rollers, airbag work

Question
How do you remove the front seats to check the connectors and which connectors are they

Answer
You don't need to remove the seats to get to the connectors.  They are located under the bottom seat pan near the tunnel.  IIRC, the airbag connector has a purple shell.  It's the smaller one.

To remove the seat, first remove the plastic covers on the seat rails.  There are screws under plastic caps that must be pried out.  Then remove the two screws (or nuts depending on year) in the front mount.  There's also a release clip between the screws.  Push the seat off the mount, roll the rear rollers out of the track and it's out.

PS-  Always disconnect the battery when doing any airbag work.