Waters SYNAPT G2 Operator's, Overview And Maintenance Manual page 166

3. Using the combined 2.5-mm Allen wrench and cone extraction tool,
loosen the 2 captive screws securing the ion block cover plate.
4. Remove the ion block cover plate.
5. Using the combined 2.5-mm Allen wrench and cone extraction tool,
remove the 2 screws securing the heater wires to the PEEK terminal
block.
5-88 Maintenance Procedures
Ion block cover plate securing screw
Ion block cover plate
Heater cartridge wire
securing screws
PEEK terminal block