Here is mine, I have a cabinet that the base fits into, and you need a different style of knee bar to work with this setup (so there are three different Singer kneebars, at least)
Here is where the motor controller is on this model - if you want to use the knee bar. Check in your lid to see if it might actually be there. Sometimes they attach to the underside of the handle as well.
This is what the cord ends look like- my DH rewired this and used white cord for it.
It's a rather simple procedure to convert this from a knee lever machine to a foot pedal machine if you didn't get the knee lever with it. They run $30-$50 for just the lever on eBay - for the older style you need. The newer style is more common and usually sells for a bit less.