inserting a lead of a component into the plated through hole so as to position {HEAD ~ the component} on {TAIL ~ the first side} of the circuit board; and then 
inserting a lead of a component into the plated through hole so as to position { HEAD ~ the component } on { TAIL ~ the first side } of the circuit board ; and then
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 OTH OTH OTH OTH OTH OTH OTH