wire preserver

I found these on Mopars by Crane. I also saw them listed in Mopar Collectors Guide.

http://moparsbycrane.com/page/mhm5/New_Parts.html

My alternator is new but its a stock unit. I also have aftermarket speakers. But nothing wild. Is this something I should worry about for my Duster, being that most of the wires are original. Thanks