This should be easy, but I can't find it in the manual and thought I'd ask before I put it where it doesn't belong.
On the 7-pin connector, there's a black wire coming form the middle pin and has a lug on the end. I'm sure it's a chassis ground, but I don't see it mentioned anywhere in the manual other than the diagram on page 16, I don't see it in any photos or mentioned in the text.
Other than the wiring looking like a bowl of spaghetti, the install is going good so far.
Oh...The old RailKing 2-8-0 didn't have a tender backup light or marker lights. I think I have a spare light housing for the backup light, but not sure where or IF I should install the marker lights on the tender. Is this something not prototypical, I don't recall seeing marker lights on a tender?