Hi,
the schematics are here for your model :
http://911c1.de/porsche/Schaltplaene/plaene1-10_carrera_32.pdf
See 'blatt 6' for the battery and the contact switch.
The cruise control should not have an impact, you can drive the car without the unit in and the clutch switch is only used in the cruisecontrol circuit.
You say some of the electrics (power window, ...) are not working, do some work then or are all dead ?
Frank
PS: on the right you find the cruise control (blatt 6), the area where you did the changes
'tempostat steuergeraet' = cruise control unit
'kupplungsschalter' = clutch switch
'schalter tempostat' = cruise control stalk
'relais tempostat' = cruise control relay