For reference, this eBay auction has a good picture of that module:
1998 Porsche Boxster Steering Column with Ignition Switch and Key | eBay
What I do know is that the interrogation to the transponder in your key passes through that module. That connection is required for the car to start.
a little corrosion on one of those connectors under the seat may still be the problem. I had to replace the entire connector on one of my cars, too much corrosion.