Making a socket 8 for my CR-70?

[miniman82]

This came up once or twice in the past, but I cannot locate the post. My CR-70 didn't come with a socket 8 for testing 70* color roundies, so I'm hacking up an old brightener to make one. Going off the knob settings for a 21AXP22, I found heater voltage on pins 4 and 10 of the cord coming out of the unit. But the others I'm lost on, can someone please direct me to where the other connections must be made? I believe I only need the G1 and cathode connections in order to test a CRT, right?

Reason: I hate the universal adapter, and being able to do color tracking tests would be nice.