[ARkit plugin] Facetracking. Change sloth to my 3d model

Hey there, I've been playing around with the face tracking examples provided with the ARkit unity plugin and now I want to go a step further and use the 3D model I made. It has the blendshapes necessary but I cant the model to be displayed when the face is tracked within the remote app.
I know this might be a silly question, but I am new to unity.