Waters Autospec Premier Operator's Manual page 213

To complete disassembling the outer source assembly
1. Remove the screws that secure the metal pillars to the source locating
plate.
Metal pillar
Source locating plate
2. Remove the metal pillars from the source locating plate.
3. Remove the 2 screws that secure the contact rail assemblies to the
source locating plate.
Contact rail assembly
4. Remove the contact rail assemblies from the source locating plate.
Source maintenance 7-55