originally bingos had:
1] total replays / total out - number of credits won
2] total plays - number of times the game was cycled by coin or credit
3] "coin out" - a meter that is only on the very early game schematics - but there's wires on most games on the ball trough to support it. It records how many credits were reset off the replay register when the game was power cycled (or the knock-off button was used on early games).
doing a little math with the above you can figure out the profit and split it with the location, and you also know how much play the machine is getting.
the later games that gave multiple "credits" per coin complicated life. Sometimes the meter is recording coins inserted, sometimes "total plays" (i.e. if the game only took quarters and was 1 cycle + 4 credits, the meter increase 5 for each coin).
worse was the games that took both a nickel (1 cycle) and a quarter (1 cycle + 4 credits) ... some had a meter for each coin and recorded the number of coins, but they also usually had support for a "total plays" meter.
then on games with the kumbackkey on the cabinet side, another meter records how many credits were added using the key switch.
then there were games that limited the number of coins you could insert per game, but if you had credits you could cycle the games more times than the coin limit. Those also tended to have coin deposited and total play meters.
assuming the location was paying off credits, as the operator you needed to know "coin out". That gets reimbursed to the location, then the remaining loot in the cashbox gets split per agreement after adjusting for any key plays.
without a "coin out" meter, you have to count the coins in the cashbox to calculate the reimbursement amount. e.g. if there was 1000 "total plays", 400 "total replays" and 700 coins in the cash box, then the location would have paid out 100 coins.
to avoid the math, the "coin out" meter just gave the answer, and other meters were hooked up so counting the coins in the cashbox on location wasn't needed.
the common factory-installed meters were total plays, total replays and key switch.
on super wall street, the schem shows a "coin meter" that is counting the number of coins deposited. It won't increment when there's credits on the game. There's also the key meter, total plays and total replays. You'd need to look at what wires are connected to the meters to verify what they are doing.
fwiw, super wall street is slightly different from bali. They added an alternator unit and alternator relay in the multi-coin relay circuit ... that would power the multi-play relay every X number of coins, where X depended on the cam profile of the alternator unit.