Sena Bluetooth SMH10R v4.3 User's Guide - Manual (Page 7)

English
SMH10R
7
4. Attach the main unit to the velcro pad of your helmet.
5. Place the helmet speakers with the velcro pads, centered to
your ear, in the ear pockets of the helmet. If the helmet has
deep ear pockets, you can use the speaker pads to place the
speakers closer to your ears. Attach the speaker connector to
the 4 pin connector of the main unit cable.
6. There are two types of microphone that can be installed in your
helmet. In the case of the attachable boom microphone, place
the velcro end of the boom microphone between the internal
helmet cheek pad and the internal wall of the helmet shell and
attach the microphone connector to the 2 pin connector of the
main unit cable. The boom microphone should be mounted so
it is positioned close to your mouth when you are wearing the
helmet.
In the case of the wired microphone, attach the velcro pad for
the wired microphone to the inside of the chin guard for full-face
helmets. Place the wired microphone on the velcro pad and attach
the microphone connector to the 2 pin connector of the main unit
cable.