Adapt NED reference frame

Hi

I am trying to use quaternions in moving a 3d cube with sensor data (accelerometer, gyroscope, magnetometer) using the ahrsfilter. It works quite good but I have the following problem: I want to estimate positions and as a reference frame I have the choice of the NED or ENU frame. The problem is that for my purpose the x-Axis should show up, the y-axis to the left and the z axis down or looking to you (see picture). Is there a way to adapt the orientation of the reference frame which is NED or ENU ?

So to summarize, since the AHRSfilter offers only NED or ENU, I want to transform/convert the NED to the customized frame(left on the picture).