As a DC native, I really appreciate "The Maryland Crabs" branding. OH WHAT I WOULN'T GIVE FOR SOME MARYLAND CRABS AND OLD BAY RIGHT NOW!

Thanks for showing me a version of this working. If you'll indulge, can you treat me like an idiot and help me complete the connections. Here are photos of what I'm working with.

I think the male-male TRS cable I'm working with isn't the right thing to use as input to the iphone. OR the white iPhone dongle is only capable of sending, rather than receiving, audio via a TRS cable.

On the back side, I got these 1/4-inch-to-RCA adapters for the left and right monitor channels. I think I need something like these RCA-to-TRS adapters to plug right into the iPhone dongle but I'm not 100%.

Any thoughts?