Hi Mogwye I don't suppose you took any photo's of what you did? To make an uber useful "how to" by any chance? What's the DCM? Is there one for each side? If not, how did you get the two wires from the passenger side mirror all the way over to the DCM (depending on where it actually is!!)? or vice versa if the DCM is on the passenger side in any case....
Google, google and google
Here you go...found some instructions on how to remove the DCM's which also gives the locations (obviously)
This was taken from another site...I can't link to it...
"Here is what the Haynes book says about Door Control Modules.
1) The door control modules ( fitted to each door ) control the operation of the electric windows, door mirrors, courtesy lighting at the base of the door, and the function of the central locking motors within the door locks. All the door modules are networked together, and share information with all the other modules on the network.
2) To remove a module, first remove the door trim panel. CAUTION: THE MODULES ARE EXTREMELY SENSITIVE TO STATIC ELECTRICITY. PRIOR TO TOUCHING THE MODULE, ' EARTH YOURSELF BY BRIEFLY TOUCHING A BARE METAL PART OF THE VEHICLE BODY OR ENGINE.
5) Undo the retaining screw, release the clips and remove the module from the door trim.
6) Refitting is a reversal of removal. Note that if a new module has been fitted, it may be necessary to have the software reprogrammed using dedicated Saab diagnostic equipment. Entrust this task to a Saab dealer or suitably equipped specialist. ( sounds like it will need TEC II if you swop a door control module ).
EDIT: Edited this in IE to see if it retains formatting...