@lonestarjacket - Thanks for posting the SRC manual - save me from going to find it!
Here is my guess - move the white wire that was in the SRC RC terminal to a Rachio C terminal (see page 8 of the SRC manual).
Do you want to have the rain sensor connected to the Rachio? If so, then move the black wire from the SRC C terminal to the Rachio SC terminal and the brown wire from the SRC RC terminal to a Rachio sensor terminal (e.g. S1). If not, don’t worry about this.
I think the aqua wire is for a Hunter remote control device - not needed on the Rachio. See page 9 of the SRC manual.
If that didn’t work (it should), post a picture of the Rachio wiring and I’ll take a second shot at it.