two things... for the connection thru the chassis you will have a wire attached to a mounting lug of 1 of the coils (somebody mentioned pic from other side), this may be your black-yellow
and... in positioning the tab under the mounting screw, if you pull the jumper wire a little tight to the spring loaded shoe then the shoe no longer makes contact. Move the tab so its pointed towards the shoe and ensures slack in the jumper. I once made this mistake on a Diamond Jack and wondered why the roto stopped scoring...