In my engine overhaul project I wanted to keep things as original as possible. Because of age (and my mishandling) I broke a number of the clips and attached wire ties. To help others save a little time here's a picture of the items I sourced and the Porsche part numbers. The so-called cable binder is the wire tie that attaches to threaded studs that are welded to various places on the firewall, eg. The others are called both harness clips and plastic clips by Porsche. In most cases these go into brackets that have holes for the clip on one end and are bolted to the engine or other location at the other. In some cases, like the bottom of the radiator, they pop into holes drilled into the plastic.