Yeah, in other countries, the cab had a logic board that would plug into this connector. It would multiply the # of coins to the # of pulses each coin would produce.
E.g. Assume the common "quarter-equivelent" coin in Germany was actually worth $1. The factory or op may set it up so that putting in $1 worth as a single coin would pulse the coin in 4 times giving 4 credits.
Conceivably you could have the opposite: Something that would take a 5 cent coin and wait until the 5th one inserted to send just 1 pulse to equal a normal 25 cent drop.
Other boards like Atari's had this built into software through dip switches: 1 coin 1 credit, 2 coins 1 credit or 1 coin 2 credits, etc...
These bypass boards simply ensure a 1 coin = 1 credit. There're nothing more than a jumper wire configured with a .156 header and foil traces.