Wire Harness Manufacturer - Meridian Cable Wire Harness Manufacturer FAQs. Get information on how Merdian Cable Assemblies creates a custom wire harness. We supply wire harnesses all over the USA and answer the most commonly asked questions from how we create a custom wire harness to fit your needs to providing information on what wire harness manufacturers actually do. Wire Harnesses & Cable Assemblies | DSMT Harnesses & Cable Assembly Contract Manufacturing What’s the benefit to outsourcing your harness? It’s simple: you get a high quality, production-ready product at a lower cost. Time and time again our customers tell us how much time and money they have saved by outsourcing their harness or cable assembly to DSM&T. It’s no coincidence.