tach wiring for 68

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Im trying to figure out where the blue wire gets power from to run the ignition on my 68. Diagrams say the blue wire on the starter solonoid goes to the pos on the tach. Fine....where does the blue wire get power from if the yellow wire is not connected to the same stud as the blue. Am I reading this wrong? It would seem the yellow should be the keyed power as this is the only light I can get from the harness to light.

Thanks, im gettin numb

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K, I get it, DOH, yellow wire to coil without tach is connected to blue wire when using tach. See, old guys can figure stuff out ................moments before breakdown
Looking forward to next question, 3 weeks to go