DEcosse
If it's no Scottish it's CRAP!
... Motogadget also do a special breakout box for Triumphs for their Motoscope-Pro - Whether this can be used on a later R3 I do not know.
That one is for CANBUS instruments - it MIGHT be applicable for the Touring or Roadster but NOT for the classics - I would definitely defer applicability of that on the CANBUS bikes directly to Motogadget.
Here is a diagram I created for function by wire for the classics - Gentlemen, need your help - Gauges
Link Removed
^ Important to note the wire colours are those on the MAIN harness connector - they change somewhat on the Instrument sub-harness - maybe one of these days I will try to show the interconnecting info so the OEM sub-harness can be re-purposed to connect directly to the new instrument)
(this info not available directly in the factory schematic)