I just did this on my new 2021 Wolverine X2 last week. Took the 4 screws out of the seat belt assembly with a T10 torx and pulled the cover off. Inside was a toggle type switch with a raised lever that gets pushed down when the seat belt is inserted. I just used an elastic to keep the lever tight against the switch to complete the circuit. Put the 4 screws back in the seat belt assembly and was done. Maybe took 5 minutes to complete.It is actually different now. I just did mine a couple weeks ago and have already forgotten exactly how the seatbelt assembly was held together. Not much help sorry, but if it's worth anything the whole process was pretty quick and painless, whether it's plastic clips and it just needed to be lightly pulled apart, or if there's a bolt in there.
Once it's apart, the switch itself is a physical toggle switch now. You'll see(just leave ignition on), once you pop the physical switch out of it's mounting location, your seatbelt indicator turns off. I just sealed the switch up and secured it and the wire right against the side of the seatbelt, that way it's quick and painless if you ever want to return it to stock.