a circuit board having face and edge contact areas and selected connections between the face and edge contact areas, with at least some of the face contact areas at positions corresponding to {HEAD ~ the openings} in {TAIL ~ the insulating board} 
a circuit board having face and edge contact areas and selected connections between the face and edge contact areas , with at least some of the face contact areas at positions corresponding to { HEAD ~ the openings } in { TAIL ~ the insulating board }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL