Looks good. Do you have a way to drive it?
Originally I believe that these Skee Ball machines were entirely mechanical. The only electrical feature was a bulb in the head to illuminate the score. The Winner light I'm familiar with looks like a kit that was added later. It required some pins and switches to be added to the scoring mechanism and box of relays and such to turn on the Winner light once the score reached an award level. I imagine that later games might have come with this installed. Does your game have any of that extra, electrical stuff?
/Mark