Convert AUX power outlets to ignition switched or RAP

[ree]

Has anyone converted some/all of their AUX power outlets from always on to ignition switched? I want to convert one of my front console outlets and the rear cargo outlet to be switched. I know how to wire a relay and all to do this. But, what I'm not sure of is how to locate the proper wires.

According to the schematics below, I want to insert relays on the orange wires coming from the interior fuse block where I've drawn the red arrows. The problem is, I don't know where the split (labeled S212) is located. I assume it's behind the front-center console and not readily accessible up under the driver footwell. Any pointers on this?