Solder Cup Termination — Hand-Solder Fit
The 109257012101006: This plug uses solder cup termination, meaning each wire is hand-soldered into the contact barrel rather than crimped. That changes the assembly method: you need a soldering iron and flux, not a crimp tool. For a harness builder, solder cups give a reliable gas-tight joint on discrete wires — the gold plating on the contact wets well with tin-lead or lead-free solder. The trade-off is assembly time: each of the 12 positions is soldered individually, so this plug fits low-to-medium volume builds or field repairs where a crimp tool isn't on hand. The free-hanging mount means the completed cable assembly plugs into a mating header mounted on a board or panel.
