Agilent Technologies 8453 Operator's Manual page 241

Figure 49
3 Take the snap mechanism between two fingers and press it together to get the
Figure 50
Coupler
4 Replace the middle rear foam block.
Maintenance and Repair
Exchanging the Main Power Supply
Sliding in the Light Pipe
light pipe end into the coupler on the main power supply.
Attaching Light Pipe to Main Power Supply
135