Coil Wire Route

Hi folks, Does anyone have a picture or can supply explicit instructions to correctly route my coil wire from the motor to the coil on my 73 WR250? Also, the blue and black wire are self explanetory due to the size of the connections. I have a blue wire pigtailed off the main blue wire I'm assuming goes to the kill switch. I have a yellow and white wire that aren't being used. Shouldn't there be a ground wire going to the coil bracket on the frame?

Certainly not knowledgable about your year but I can state the following. From approx 10 years newer.

The yellow is generally 12 volt power and goes to a box about half the size of a pack of cigarettes and yellow runs to the headlight. I generally tape it up and never have a problem.

some wr models seem to be wired with a different wire for everything such as tail brake speedo or stuff like that. My bikes don't have a ground coming off that stator group. That is probably why it is important to scrape paint off where things mount. If you find the specs for your bike and for electric output and it is listed as 35+35 or something like that then probably the white one is hot as well. perhaps someone can be more specific. Grounding out the blue makes the spark stop which is how the kill switch operates.