Acom 04AT Operating Manual page 17

2.4.2. If the mast mounting option is chosen – figures 2-6 & 2-7
The weather protective cover (1) is removed by unscrewing the five bolts (2). The
five cover holding brackets (6) are left in place, attached to the tuner body. Using the
provided in the mounting kit four flat-head bolts (4), the mast bracket (3) is secured to the
tuner body and then the weather protective cover (1) is secured back in place with the
five bolts (2).
Thread the three hose clamps (5), provided with the mounting kit, through their respective
rectangle opening pairs in the mast bracket (3).
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Fig. 2-5. ATU installed on a wall
Fig. 2-6. Mast installation bracket