shark Tooth Prime Manuel D'instructions page 16

Connect the two speakers to the plug B and C.
Place both speakers in the deep ear pocket of your
helmet. You can fix the speakers using the velcro
pad supplied in the box.
Place both speakers close as much as possible and
centered to your ear.
Connect the microphone half-boom to the plug D
and place it on the left side. Keep the microphone
as closely as possible to your mouth when wearing
the helmet. Be sure the white arrow is facing your
mouth.
4
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Place the external button on the left side of your
helmet using the 3M adhesive already on it.
Place back the helmet padding.
Hide
under the helmet padding and leave out only the
microUSB plug for recharging.
the charging cable as mush as possible