TM 10-3930-669-20 (21) Open engine access panel (3). (22) Connect  connector  S21  (30)  to  connector  P21 (29). (23) Install   brake   pressure   switch   (27)   to   master cylinder (28). (24) Install  brake  line  (25)  to  fitting  (26)  and  tighten fitting (24). (25) Install   cable   (22)   on   clevis   (23)   and   tighten screw (21). (26) Install hoses (17 and 18) on two fittings (19 and 20). 15-17