C9, 47 uf/16V is the bypass to ground for -12V coming in on J12-7. So the positive side goes directly to a ground feedthru exactly between C9 and C8 and nearly on the centerline of C9 and C8. On the bottom side artwork you will see it hit the corner of two perpendicular traces connecting to ground mesh artwork that surrounds and connects to C48. Ohmmeter reads to ground only the resistance of the test leads.