[morzh]

If you have 5 wires, do this:

The wires that go to thick-wire wound winding are the filament.
If you do not know what wire goes to what winding, do this:

Get an ohmmeter and figure out the two winding: the filament (fraction of ohm, only two wires show continuity) and the Hi-V (three wires show continuity of tens of ohms).
The two halves are your 62 and 68 Ohms. There should be 130 or so Ohms between the Hi-V ends.
These two ends are your plates.
The centertap is that middle.
The filament is, well, the filament.

It does not matter which of the two ends go to which plate, and how the filament winding is connected.

This is it.