A decided to go with a small antenna connector for BCK, that way it would stay clean and small while keeping the signal clean. On the board itself I kept the BCK signal along the board edge paired with GND.
For the finished product I included a coax antenna cable, a wire harness, the 2 resistors needed for the cps2_digiav board itself, and all additional wires required, pre-cut and tinned.
I think it turned out pretty well, I'm happy with it at least.
Ill throw up Gerber and BOM files on my GitHub.
Premade kits available at my store.