Fi Restrictor Kit for M600 - Fitting Instructions.

Hi

I'm going to need to refit the restrictor when my bike arrives. As far as I'm aware the 'kit' Fi charge £180 for is in essence 2 large flat washers! Luckily I have these but they are in a bag not on the bike. I'm assuming they go in the carbs somehow but not sure where.

Any help/advice would be brilliant. I'm new to bikes but have been playing around with cars for years so I know which end of a spanner tightens screws. That said I've never really understood or enjoyed playing with carbs. I'm sure they work via magic!