On the left side of the schematic is the list of relays. Under "contacts" are listed the number of each type of switch on that stack, A open, B closed, C make-break. It doesn't look like any of those four you mentioned are interchangeable. Since your relay labeled V has five contacts and a blue-black lead wire, its switch stack is likely from the original Q. Probably your best bet for finding replacements is the EM parts seeking thread.

Q has two open (2A) two closed (2B) and one make-break (1C) total of five. U has six total, V two open. The one contact you're seeing on the schematic is the one that energizes the coil. The others in the switch stack are activated at that point. But...to make it interesting they are scattered all over the schematic, identified by the letter name of the coil and the color of the wire. For instance on the left of your schematic at index 6 is a switch from the H stack with a WH-BLK (white-black) wire. It energizes the playfield lights.

Here is another shot of V and H. Also a shot of a donor switch I have which will replace H, only the middle blades need reversed to make them Normally closed. It has the proper 9738 coil. It should be easy to find a replacement for V, only two switches. Fifty, we can PM details about getting my switch to you.

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Here's a shot of V. The screws are 3/4" and 7/8", looks like either length will do.

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