One Systems PM4-M V4 - Manual (Page 4)

Figure 3 is a representation of the Link assembly. This assembly MUST be used
whenever the PM4-M is being used.
Figure 3
Mount the pole mount section (see Figure 4a below) of the bracket to the pole
at the desired height on the pole. The loudspeaker bracket shown in Figure 2
should be removed prior to hanging the pole mount section. The bracket is
mounted to the pole using BAND-IT stainless steel bands. DO NOT
SUSTITUTE bands of other material or other widths!
There are SIX locations
on the pole bracket for bands. ALL SIX LOCATIONS MUST BE USED.
Figure 4a