seat belt chime disable?

[YarisYore2012]

To silence the seat belt buzzer I have tried the sequence mentioned here
on my 2008 Yaris sedan with no success.
Turn key on, change display to Odometer, turn key off.
Turn key on, press and hold button within 6 seconds.
Hold for at least 12 seconds, etc. etc.

I am going to cut the 4 wires under seat and then patch them back
one at a time until I find the one that triggers the seat belt buzzer.
Anyone's guess as to how the switch is wired or whether weight on the seat is part of the trigger or just the car moving more than 11 mph.
The seat belt wires- there should be just 2 of them, either break or make the connection to trigger the buzzer after the car reaches 11 mph.

Nothing else works and I would rather not have the red seat belt light blinking at me.