pwr comander hub

[MaldonCsalt]

A question Im sure someone on here will be able to help us out with Im looking at getting a pwr commander hub to run two differant maps one for dry nitrous and one for just normal running around, the question do i requre the "harness" thats a optional extra with the hub ?

ebay link http://cgi.ebay.com/ebaymotors/Power-Com...ccessories

Cheers Dave