The support structure first end portion may be received in {TAIL ~ the upper first and second recessed sections} and the support structure second end portion may be received in {HEAD ~ the lower first and second recessed sections} 
The support structure first end portion may be received in { TAIL ~ the upper first and second recessed sections } and the support structure second end portion may be received in { HEAD ~ the lower first and second recessed sections }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD