From memory, 91 - 93 was GL and Si (Non vtec for both)
94-95 Gli and Vti (vtec)
We can rule out the vtec button.
I can also 'guestimate' that the Mugen decal was probably taken from a car model kit and stuck on the switch. How do I know? I used to stick them everywhere when I used to make hobby cars.
At the end of the day, no one will be able to help you without inspecting the wires and where they run to. You will have to do that yourself. good luck :thumbsup:

