TM 9-2320-365-20-5
(13) Install two twist locks (20) on heater (11).
(14) Connect connector P4 (18) to connector J4 (21).
(15) Position heater control unit (15) on heater (11).
(16) Latch two screws (16) on heater control unit (15).
(17) Close door (14) on heater control unit (15).
(18) Latch screw (13) on door (14).
(19) Install eight screws (22) in heater (11).
(20) Install eight screws (23) in heater (11).
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