Got home and pulled out my 99K to look at it. This one has a notch in the bed of the machine to accommodate the wires. My newer 66 has this also, but the older ones do not.
She sure is a beauty! This one came with a pin wedges in the shuttle race - and it wouldn't sew at all. Looks like someone ran over a pin early in the machine's life, and it never got used after that.
The set screw
And the notch for the cords.
