Good day. Thank you for your question.
The Truck Kenworth T680 is not in the supported vehicle list, but you may perform the auto-scanning feature with FMB140 or use FMX1XY + CAN-CONTROL to check if you are getting any CAN data from the specific vehicle model as on our Wiki page - https://wiki.teltonika-gps.com/view/FMB140_autoscan_feature_instructions
Should you not have these devices/CAN adapters with you, then you may perform manual scanning to get the program number from the device. For the manual scanning instruction, please reach out to us via VIP Helpdesk or contact your Sales Manager/Distributor. If you don't have any contacts with our Sales managers, please contact them on our official website https://teltonika-gps.com/
and click on the "Contact Us" button. When you will click, please fill the form and submit it.
Note: as a topic, please choose "Vehicle telematics" or you can send an e-mail with the description of your situation to email@example.com
Thank you for your understanding.