William, this is what I'm talking about, on most motorhomes up front there is a data connector
that silverleaf 6 pin connects into. Location understeering column left side, top of dash little area
with cover that also filler point for brake fluid. Left front side compartment. I have found a pig tail
of wires taped diagnostic's, than the Packard data connector for Allison transmission that some
motorhomes use for engine data also. On the engine in rear itself which I mention location can be
inside frame rail, along side of motor, in back etc. Silverleaf connection on early motorhomes
is off Packard connection they must have a plug end wired for it. I can provide you with wiring
from Packard connector that I have if you have to connect the 3 or 4 wires to connect to silverleaf.
I would check with the company for how they connect there product first.
Dave Atherton Retired Cat Mechanic