AiM MyChron3 Basic - Manual (Page 21)

21
Connecting cables to MyChron 3
Once all the sensors and accessories for your MyChron 3 are correctly installed,
you need to connect them to the main display unit.
On the back of the display unit, connect the temperature cable to the upper binder
and the lap cable to the lower one. The RPM cable must be placed inside the two
holes on the left of the display unit ( as seen from behind ).