Nope, read the wiresplice carefully;

"now separate the following wires from the rest: Green (earth), Light Green/Red (neutral switch), Green/Pink (oil level indicator), Green/White (side stand switch)."

Yep, you've cut the oil light wire so the oil light is on.

There is no way to fix this other than putting a switch on the wire. If the oil light wire sends a signal (i.e. there's oil in the oil tank) the HRC card won't work. If it doesn't the oil light will come on with the normal card.
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