Nuts threadedly engage {HEAD ~ the posts} to engage the conductive bar securely to {TAIL ~ the posts} 
Nuts threadedly engage { HEAD ~ the posts } to engage the conductive bar securely to { TAIL ~ the posts }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL