6 wire doorbell chime installation with Google Nest doorbell
Does your doorchime do a ding-dong for one door, and a dong for the other door? If so, it looks very similar to the wiring here:



Friedland Doorbell Manual

0 (top left) is common and not connected to anything inside the chime

T or 3 is transformer (which Google Nest may call TRANS)

1 is push for door 1 (which Google Nest may call FRONT)



2 is push for door 2 (or REAR, leave this wire connected to 2)

https://support.google.com/googlenest/answer/9247327?hl=en