Instead of installing the small cable hatch, while looking through an RV dealers parts catalog I came across the number for the large cable hatch.
http://www.amazon.com/Valterra-A10-2.../dp/B00RBLR8BU
I'll have to take some measurements to make sure the hole diameter is the same and if it is instead of ordering through Amazon I'll go to the dealer because it is 1.00 cheaper, no shipping and I get a repeat customer discount off the already lower price.