Rigging consult

Hi All.

Im having a problem trying to do a rig of a character, Im working in Harmony Advance, (Not node view)

I would like to link a draw-A to a peg, but I would like this draw-A stay behind of another draw-B, which is not in that peg, but keep all other draws of the peg in front of

I mean.

PEG-
eyes
nose
ear-1
head
BODY-
ear-2

I want the ear-2 stay behind the body but follow the Peg position and rotation.

(Im trying to rig a Dog with big ears)

Ok, thanks so much