X-Fusion Slant RL2 - Travel Adjust

I have a pair of the above forks which come set at 160mm travel however are internally adjustable to 140mm, 120mm and 100mm. The travel is adjusted by removing the pin to move the position of the puck to the desired height. I have taken the forks apart expecting there to be four holes each 20mm apart however the below is what I have found. There are actually five holes, the hole next to the one it is currently set at is 15mm apart and then the other four are 20mm apart.

Does anyone know which one I need to use to set it to 140mm?