Welcome to Pinside! There are many people here more than happy to help you, but it first helps if you understand the manual and schematic. You can download them here.
https://www.ipdb.org/files/2648/Williams_1974_Triple_Action_Instruction_Manual.pdf
https://www.ipdb.org/files/2648/Williams_1974_Triple_Action_Schematic_Diagram_continuous.pdf