How hard is it to wire up the headrest speakers?

I just discovered that I have headrest speakers. I don't think they are wired up to the head unit. How difficult is it to wire/How Long to do the job?

If you have the correct wire, it is pretty easy. The wire has it’s own plug that plugs into a second plug in the back of the Mazda Radio. You run it under the carpet and up the back of the seat with the help of a coat hanger. Mine didn't come with speakers so I ordered the Clearwater set. It came with all of the wire with the proper connectors already attached.

I ordered the factory wire harnesses from Performance Buyer's Club and put a pair of Rockford Fosgate 3.5" in each seat a couple of years ago. I bought them from these guys because they have the correct harnesses for the different model years. I had to trim the plastic cover that goes between the speakers and the seat fabric to get the 3.5" speakers to fit, though. I can, however, hear the stereo going 80 with a semi next to me. :D