Image 1: PSL top eurocrate
From left to right: ISS inner loop, old ISS second loop (depowered), reference cavity heater (depowered), and TTFSS field box.

Image 2: PSL bottom eurocrate
From left to right: injection locking field box (depowered), injection locking servo (depowered), monitor field box, PMC locking field box, and PMC locking servo.