Acewell digital speedo and self cancelling turn signals

[MortGarson]

Hi all
My speedo in the toaster box on the FLHS crapped itself so I got an Acewell 2853 all in one. It is triggered from a sensor that picks up a signal from a magnet glued to the rear pulley. Not too bad however the self cancelling wire that came out of the speedo has no home. Has anyone, who has fitted a digital speedo the old mechanical setup found a way of hooking up the self cancelling part.
Cheers glenn