Fresh Air Blower Control - Bulb Type

[techguy]

Here is a simple one, what type of bulb is used on the right hand side of the fresh air blower control panel? I am in the middle of restoring my heating and air control system and someone over the years took all the wiring apart. The light socket for the blower is intact but empty.

At the moment I have isolated the power lead going to the controls and have an extra cable that looks like it would take some type of push in bulb (different from the instrument panel guage bulbs). Do I have the right cable for the blower indicator light?