There is no speed signal wire for the Next Gen'ers.

The speed is sent via all of the wheel speed sensors used for the ABS. The computer then takes this information via the CAN wires and registers a speed at the gauge.

You'll have to use the simulator to hook up anything that needs a speed signal.

And for the record, Pin 9 on M24 (the Combo Meter connector) is the fuel level sensor wire (1 of 2) and is Brown (not Sky Blue).

Tapping into that wire will send your fuel gauge haywire!