VMSPC 12

My motorhome has a 12 pin Allison Diagnostic plug under the dash, I cannot find any other plug there. Using google I found a product called VMSPC12 at RVUPGRADES, would that one connect directly into the 12 pin plug in my RV?

Is RVUPGRADES an authorized dealer of Silverleaf products and carries same warranty and support as provided those who purchase directly from Silverleaf?

Does Silverleaf have a 12 pin version on their web site and I just missed it?

Thanks

Ray