Connect fingers phalanges on Ironman hand

Hi, I’ve got an IronMan hand armature. I separated all the phalanges and changed the pose of fingers (partially closed fist).
Now I 'd want to connect the phalanges with the armature connector (like a corrugated cilynder ). I’ve the original connectors , straights, I tried to bend them (shrikwrap) but the final effect is not so good.
Can you suggest a better way to connect fingers and make them a closed mesh, manifold ?