A sample from the products for the Electrical 3 (for T9.9er) include: Lanyard, Stop Switch, Extension, Wireharness, Screw(6k0), Panel, Sw1tch.
The lowest price component in this Electrical 3 (for T9.9er) parts-list fiche is the Washer, Spring.
In this schematic the "Screw(6k0)" is used most often.