Work in construction, much? A couple of wire pullers, sometimes called, "runners" would go into crawl spaces, attics and rooms where the drywall hasn't yet been placed. They tug, pull and generally put the wires where the actual technician or electrician would tell them. Then, the actual technician or electrician would make all the connections to get the system up and running. Standard procedure. When you find yourself in a damp, moldy crawl space with spider webs stuck to your hair, you're wire puller, not a technician or electrician.