There have been a number of write ups already on this topic...
I'm fairly sure that there was a really good one with the wiring diagrams and all floating around somewhere...
Buy hey your new so let me point out the search function...
Its roughly in the middle of your screen about 10cm (4") down...
In the top orange bar...
Search for X3 (as that's what your car is), tacho install, and other such variations of those...
If that turns up nothing go an buy a repair manual/workshop manual for your car, it should have wiring diagrams in there...
Cheers
scythe
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My car:
2000 Accent LC 3 door...
SS inductions CAI...
Exedy HD stage 1 clutch...
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