Floor wiring covers

Hello all. Got a quick question for my 71 Demon. I bought this car as a roller with many boxes of parts. The PO had already done most of the sheet metal. And being as this is my first A Body this is one of the areas I'm not familiar with. I see ads for floor wiring covers I know what they do but have no idea where or how they install. I'm assuming they run the length of the floor in the passenger compartment adjacent to the inner rocker panel. My thoughts are they may be a good idea to keep the harness from getting stepped on under the carpet and that they may make a difference on the fitment of carpet. Does anyone have pictures of how they install and others thoughts on using them? Thanks for any feed back. Here's a picture I found of the actual parts.