It's writen nowhere which wiring to connect the oil pressure gauge to.
I found on an electrical schema to connect the gauge to the "Brown/Green_black_orange" connector but looking at the schema, i ask myself if it will work while the oil pressure sender is connected to the "indicator lamps" connector.
Yes this document was provided with the gauge kit.
I connected to the [ brown/green - black - orange ] connector.
I couldn't start the bike to verify. Well i'll see later.
Thank you chopper.