This is the relevant part of the schematic:
Gigi end of game bonus (resized).jpg
I think the adjustments are the three red arrows on the left. If I understand this correctly the 1st advance (1B relay tripped) always gives you 100 points (or fires the Q relay) through the Motor 4C switch. Similarly the 5th advance (5B relay tripped) always gives you a replay through the Motor 1D switch.
The other three advances (2B, 3B and 4B relays tripped) can either give you 100 points or 1 replay depending on where each of their adjustment plugs is placed. Given the way the schematic is drawn I don't see how 1B could ever give you a replay or how 5B could give you 100 points. So in the case of all five advances there would be five awards to give: 100 points, 1 replay and three more that could be either 100 points or a replay.
If you were to add your own jumper between the Replays sockets and the Hundreds sockets on the left then every advance would award both 100 points and a replay. There may have been a jumper in the game but it's not shown on the schematic.
/Mark