The test cable for the laptop has a 9D connector on one end and an US NATO plug on the other. You need to run Hyperterm (RS232 emulator) to talk to the autopilot and will need to set this up according to the KAP140 install or flight line maintenance manual. Unless you are familiar with this I would suggest going to a competent avionic shop. You have to be careful as there is a configuration module which contains airframe-specific programme data and if you inadvertently delete the files you'll lose the autopilot until a shop can reprogramme this from a floppy disk.