How can custom convex collision shapes be assigned to a bone of a skeletal mesh?

I need to use convex shapes created in an external 3d application, as collision shapes for individual bones in a skeletal mesh.
I cannot find a way to assign convex shapes that are not the ones generated by the “Physics Asset Editor”. Can this be done?

You can do it by importing your collision shape as a StaticMesh and then in PhysicsAsset editor assign the static mesh as a collision body for your bone.

303439-customcollision.png

Sadly that link doesn’t exist anymore since Epic moved everything. Can anyone provide an explanation on how to use a static mesh as a collision object in PHAT?