Thanks for posting up! I cant see that module so perhaps its been taken off the seat before I got them. The Kufatec instructions read like this
Wire configuration with gray wirings:
(NOTE PRINTED CABLE)
Printing „Dauerplus Klemme 30“ – Permanent positive, fuse box
Gray cable (without print) – Permanent positive (ONLY in case of lumbar, electric
seats), fuse box
gray cable “Masse” – Ground point A-column driver site behind the cover
gray cable “C – PIN 1” – Control unit for central electric – Connector C – PIN 1
Connection Climat control unit 20-pole connector:
Wire with 2 looms: print “Blau” - PIN 10 (Climatronic) – PIN 13 for Climatic
Print “Blau Rot” - PIN 11 (Climatronic) – PIN 12 for Climatic
Single loom (without print) - PIN 12 (Climatronic) – PIN 15 for Climatic …
… Opposite to ignition positive, Fuse box SC7
After installation you need to code the control unit for central electric (address 09) to heated seats.
Byte 02 – Bit 7 – needs to be set to 1
Germans!! If they mentioned two unprinted grey cables i'd be sure. Thing is I have one thick unprinted one and a thin uprinted one. The thin one has the same size connector as the Pin 1 cable.