The sub assemblies and components that make up this Optional Parts Main Switch - Rigging Accessories include this Ext, Wire Hrns 12f (6ye-8258a-00-00), the most expensive part.
Parts such as the Optional Parts Main Switch - Rigging Accessories: Ext, Wire Hrns 20f (6ye-8258a-20-00), Lanyard, Stop Switch, Ext, Wire Hrns Ds (6ye-8258a-a0-00), Screw, Tapping(61a) are included in the Inter/drive Unit 1989 Optional Parts Main Switch - Rigging Accessories parts fiche.