Thanks for the link. Do you know if this is an electronic meter with a KYZ output or is it an analog meter with a rotating disc? According to the wiring diagrams, the ES-4 has KYZ outputs, but not the ES-5.
The ES series of meters was the first fully electronic line of meters made by GE in the early 1990’s that replace the electromechanical DS-60’s and M-90’s series. I believe that the KYZ pulse initiator was and option only for the ES-4 using telephone modem for the GE KTF-901 and KRC –901 registers on the ES meter platform.