This allows {HEAD ~ an accurate and easy interconnection} of the electric leads and {TAIL ~ the pins} of the base 
This allows { HEAD ~ an accurate and easy interconnection } of the electric leads and { TAIL ~ the pins } of the base
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH