Step 2: Connecting M-Link
With M-Link DME connectors in the Open position DME Connections | Open vs Close Orientation of DME Connector , plug the connector with a RED mark on it into the DME number 1 terminal. Gently push the connector in and slide the lever to lock the connector in place.
Plug the remaining connector into DME terminal number 5. Gently push the connector in and slide the lever to lock the connector in place.
Pull on both connectors to assure they are securely fastened
The connectors are specifically designed to only go into their proper terminals easily without being forced. In case the connector does not easily slide in, treat your ECU as a “flipped version”, meaning it is installed backwards from what was shared in step 1, making the DME terminal number 1 being the one furthest from you and terminal number 5 being second closest to you.
Never use excessive force on a connector. The DME terminals are delicate and can be damaged.