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