Quoted from Nokoro:No damage if it is removed. The game will still play, but fast switch hits may not register. The cap stores a charge that it lets out when the switch is closed so if the switch is closed for too short of a time for the computer to register it, the cap gives that extra millisecond or two of charge that gets picked up. That’s my lay person’s understanding.
The manual will have the correct cap type. The one online is hard to read. I have some I use that are labeled 470,000 pf.
Yeah I keep a bag of these ceramic disc caps on hand for my 6803 games. Cheap and easy to replace.