Only one coin counter for a MVS 2 pcb? What to do?

Hi there. I have a neogeo jamma cabinet (Brazilian Version) and i have a MVS 2 pcb. I bought the MVS to Jamma adapter & everything worked out fine except the 2nd coin counter. I have only one counter and when i put the coin in it just registers for the 1st player. Id like to know what can i do to make it register for both players and then decide if i want to play solo or two players. Thank you all.