I am upgrading from an old intermatic mechanical timer and am having trouble with the wiring. The old system was setup for 4 zones but only had 2 wires attached, white and red (if that matters). The blue yellow and green were just bent to the side. There were also thicker red and yellow wires coming into the box. Not sure where these attach now.
I would reach out to support@rachio.com and reference this thread or just supply these pictures. I know we’ve converted quite a few of these bad boys! 
Hey @MJBell7-
I will link a thread below where a user had a very similar set up from what I can tell- Emil posts some great resources for making the switch there! If there is anything else we can do to help let us know!
McKynzee 
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