2010 EC300 Speedo Power
 

I am wanting to get a Trail tech computer for my bike, I am aware that the power supply is the red and black wires into a black plug block, However I do not have the adapter from this plug block to the TT power input plug.
I have been told that there is a voltage regulator and resistor in this adapter, does anyone know what components I would need to buy from Jaycar?(Radio Shack)

Cheers

Brad