My car is put away, I think a wire goes from one of the power rails to an eyelet mounted in one of those holes.
I purchased a bunch of those basic trucks with the eyelet hole from Madison Hardware (Detroit) and Jill Sisco some years ago. They were NOS.
Off the top of my head, I cannot think of another electrically operated plastic car with metal trucks that would require such an arrangement.
And just to complete the circle, here's a photo from a buddy of mine showing the underside of the postwar 6805 Radioactive Waste Car with the hole-and-eyelet truck that we've been discussing.
I'm beginning to wonder if that hole was semi-permanently added to the bar-end truck stamping tooling at that point. There weren't hardly any metal trucks used between the time of the 6805's first appearance in 1958 and the reissue of the 6464 boxcars with metal trucks in 1969, which helps explain things a bit.
Another minor mystery kinda/sorta solved, now only 9,999 more to go.
TRW
