Pete, if you have a 1950 248 engine, it is from a Special which is a series 40.
The '47 and '50 starting system should be the same. There is no starter pedal. The accelerator pedal is the defacto starter pedal . The starter "button" is a switch mounted on the carb. When the switch is pressed down, opening the throttle a little at the carb, the switch on the carb is activated, sending power to the starter relay, [ on the '50 mounted on the starter solenoid which is mounted on the starting motor] which closes a set of points sending power from the battery to the solenoid to the starting motor.
The ignition switch, in the dash, sends power to the starting switch on the carb, as well as to the coil. After the engine starts, the carb switch is "opened" by vacuum from the carb. The ignition switch does not spring back, as do switches that are taking the place of the carb starter switch.
You can wire it as the '47 was, I believe. Probably the same as a '50.
Do you have a shop manual? Worth it's weight in gold. It will have a wiring diagram. Again, probably little difference from '47 to '50.