Yes, there are only parallel capacitors from Chemi con, marked 650V 4700uF and cost around $300 each.
The data sheet also shows how to check insulation resistance, and I have an insulation tester that goes up to 5kv.
When measured between the terminals that are connected to each other and to the mounting clamp on the insulating sleeve covering
the case by using an insulation resistance meter of 500Vdc, the insulation resistance shall not be less than 100MΩ
But this was mostly for the fun of being able to build this instrument. Later I will restore an old jukebox with a tube amplifier, thinking of keeping most of the original parts including electrolytes.