serial number KJ3 version: Starting around the front "A" channel corner:
K33 relay (channel A is short to channel B),
K34 relay (channel A is short to GND),
K35 relay (channel A input relay - front banana socket),
K45 relay (channel B input relay - front banana socket),
K36 relay (channel B is short to GND).
They are located under the CRT.
serial number KJ2 version: Starting around the front "A" channel corner:
K33 relay
K34 relay (channel A is short to GND)
K35 relay (channel A input relay - front banana socket) (double pole single throw contact)
K36 relay (channel B is short to GND)
K45 relay (channel B input relay - front banana socket) maybe soldering side?)
They are located under the CRT.