the KT-D12L is not ideal. It's meant to fit onto square taper bottom brackets.cause at the moment i have this one (KT-D12L) on the other side
thanksThe lcd3 or any other KT lcd doesn't have the capability to change/reverse the direction. The only way is to try reversing the disc face of direction or inverting the sensor.
Before fitting any PAS set up it is best to just plug it in and manually pass the magnet disc by the sensor to see if it works correctly, other wise if you glue or screw things in place you have to undo all the work again. Only once you know it is correct then you can be sure to fix all in place (so you don't get the magnet face wrong mark it with a bit of tape so you know which face was correct).