Oh... The answer is easier than you think (And I would never pay for such an adapter)
Your In-Dash multi-player will have a wire that is dedicated to something like "Parking brake sense" or "Transmission" or "Ignition sense" this is different from the memory and accessory power leads.
Depending on how it works (And truth be told I do not know) you either ground it, or hook it to power or leave it N/C and the unit works normally.
To "Sense" vehicle in motion this lead has to be connected to a switch..
Let me look up the manual for a mintue.
Found it, in the owner's manual.. OK, how to do it.
On the power harness is a light green wire.. Connect to Ground for a 5-th wheel install (Manual says must be connected to POWER SUPPLY side of parking brake switch, you do not have a parking brake (Well you do but its for emergency use only) so connect it to ground.. That is your bypass adapter.. A simple screw.
