HTC VIVE Manual page 8

8 VIVE Facial Tracker
Step 3: Slide the front of the headset outward
You need to adjust the front of the headset to access the vents so you can clip the tracker cable
later.
1. Press and hold the adjustment button.
2. Slide the front of the headset outward until the vents are fully exposed.
Step 4: Connect the tracker cable to the headset
Clip the tracker cable in the vents, and then connect the USB connector to the headset. Here's
how.
1. Insert the cable clip between the vents closest to the nose rest.
2. Rotate the clip vertically to lock it in place.