We are new and considering adding a second battery to our 2019 Greyhawk MV. Called around and was told it is possible but now due to COVID. If you have this model did you have to moving hi-amp module and if so where to. Don’t know what it is either
On ours, that is the battery disconnect solenoid. You can confirm by listening to it. Should hear a distinct click when you cycle the battery disconnect switch. I have not moved mine yet so I can't recommend a location.