illumination pin on the A/C cluster

Hello!

I've recently changed the illumination from green to blue on the A/C cluster but unfortunately it's not illuminated evenly so I'm wondering if anyone knows the pin number for the illumination? (so I don't have to go to the car every 5 minutes until I finally get it right)

I tried tracing it down from LEDs to the socket but didn't get far because it's a 3-layer board! And I really don't want to find it out using the trial-and-error method because that's when things start to blow up (at least in my case)

Cheers!