Replacing original radio and dash speaker in 68 Barracuda

I'm looking to wire up the new radio and am having some trouble, was hoping someone could lend some advice. When I removed the Pioneer that the previous owner had installed under the air vents, a bunch of the wires kind of fell out so I did not know here they were originally attached. I have the yellow "constant" wire located but am looking for the red "switched" wire and can't seem to find anything that's not already hooked up to something else. There are a couple of connectors that look like they should have something attached to them (circled in red in the photo), but that's my only guess.

Any thoughts on where the switched power wire should hook up?

Thanks!