How to use 2 Bone IK in Unreal if you have 4 bones?

Problem: I need to attach the hand of the driver to the steering wheel. Two bone IK node is perfect for that, but my driver has 4 bones in her arms:

Solution: Use virtual bones.

First create 2 virtual bones:

Then apply 2 bone ik to them:

Finally, copy the rotation of the elbow:

Done.