Anisotropy axis

Hi.
My doubt is what is the best way to use anisotropy if my model does not match any the cartesian axis as its main flow direction is NE-SW (see picture attached). Should I use that "General Anisotropy with computed angles"? If so, how should I use it? Thanks.

If you choose General Anisotropy with computed angles you need to enter K_1m, K_2m and K_3m. These conductivities are directed along the axes of a transformed coordinate system. The transformation is done automatically using the inclination of each single element. Using this option, anisotropy can be related to the varying inclination of layers.

More information is provided in the FEFLOW Help: http://www.feflow.info/html/help71/feflow/mainpage.htm#t=08_ProblemSettings%2Fanisotropy_settings.html%3Frhhlterm%3Danisotropy%26rhsyns%3D%2520