Here’s the main station, at the credenza. Wires from all the stations terminate at this location (see white labels we used to keep them all straight), then wired to the blue pieces which plug into the unit. The black cube (not the dewalt box!) is a ‘ferrite bead’ attached to the AM wire antenna to prevent interference.

All connected and ready to roll:

In the wall:

…it’s not attached yet that’s why it’s crooked. So yeah, we’re setting our radio presets (I don’t even know any stations) but it also works with the iPhone no worries.