MartinLogan Motion Helos 10 - Manual (Page 7)

Installation 
Figure 11 . Installation step 9.
8 Gently pivot the tweeter stem to point towards the pri-
mary listening position. To rotate the speaker, rotate the
entire speaker assembly. DO NOT rotate the tweeter
stem.
9 Gently press the grill cover into place.
Figure 10 . Installation step 8.