IK Retarget chain orientation incorrect - how to fix?

Hi, I’m attempting to retarget a quadruped using IKRig. Everything is working except for two chains on the target SKmesh (spine and tail). They are animating on the incorrect axis (Eg: the chains bend side to side instead of up and down). The joints in the source skeleton are straight in a line, so I assume UE is failing to guess the proper orientation. Is there a way to set the orientation for a chain manually?