WHY are electrostatic tubes wired so WEIRD?

[rca2000]

Looking at the diagram of my 48-700, 50-701 and other Electrostatic-Deflect. type sets...It seems to ME...that the CRT in ALL of them is set up in a STRANGE way..

There does NOT appear to be a "2nd anode", at least in the way we are used to in most other tubes. like a 12LP4, 21AXP22, and about any M-D tube I have ever seen. . And WHY...does the HV seem to go to the CATHODE of the CRT--I am used to VIDEO being there--and at the most 250 volts or so. On E-D tubes...the HV, through some resistors seems to end up there!!

WHY...is this????