Source cables splice into destination cables, left to right. Add cables on either side, then Auto-Map to connect them sequentially by tube.
Add a source cable and a destination cable to begin.
Spliced — unlabeled
Spliced — SPARE
Spliced — live circuit
Spliced — DEAD / DAMAGED
Row grayed out = not spliced
Type "SPARE" or "DEAD" in Comm to set that status