I recently inherited a Snow-Joe Plus 322P electric snowblower. Its electric cord was in terrible shape so I first needed to replace it. When I disassembled the handle (to get to the switch where the original cord is connected), as the handle opened a few pieces fell out. I can't seem to figure out where they're supposed to go inside the handle. Can anyone give me a little assistance? I am especially flummoxed by the items in my photo labelled "B" and "D." "B" is notched on both sides so I am guessing it somehow fits on the toggle switch. "D" is a spring-loaded thing that apparently is moved aside when the key is inserted. I'd appreciate any help. Thank you.