The way you are wired each switch will short out the power from the transformer.
The on/off switch shorts it on the closed position and the belt runs when it is open.
The pushbutton is normally open and shorts it when you push it.
Take the red wires from the transformer direct to the 2 power connections.
They do not go to the switches at all.
Run a black wire from the transformer to each switch.
Run a second black wire from the other side of the slide switch to the Belt connection.
Run a fourth black wire from the pushbutton second contact to the Eject connection.
Now, just to make it confusing, you can put the switches in the red wires instead and run the black wires direct, the power won't care.
Think of it like a garden hose, you can shut off the valve at the start, or kink the hose at the end, either way, no water flows.
