Believe me, I'm no guru, but Bob Roberts made this easy with his schematics. The only thing I did was remove the arcade power supply, hack off the end of a PC power cord (not the PC end, the plug end) crimp on a 'U' connector, and hook it to a distrbution block (barrier strip)
I sweated doing this for a while, thinking about it one way and the next, and finally just took the plunge. Worked first time.