Ok, looks like on the 6502 Processor Φ0, and Φ2 come from the 6502 processor pins 37, and 39.
Trying to figure out how to hook up a cat box to and Asteroids board. Have not been able to find a catbox guide for the Asteroids board.
I did find a guide to using the HP 5004a, but it looks like the sigs are going to be different, but that might because I'm using a different rev board than what was originally done with the Hp5004a