Important: Always switch off the device before moving or disconnecting the cable.
Step 1: On the back of the laser head you will find a black clamp which holds the white cable in place. Squeeze it gently on both sides and slightly pull it 2-3 mm to the front. Unplug the white cable on the back of the laser head by gently pulling it out.
white cable back black bracket
Step 3: Press the black bracket back in place.
Step 4: Put the transparent tube on the copper tube.
This is how it should look like when the laser head is plugged in correctly: ▼▼▼
Step 5: Afterwards you can switch the device on again and connect to it.