{HEAD ~ a pusher} inserted in {TAIL ~ the second housing} for a slide, the pusher being configured to be engaged with the second engagement part, wherein 
inserted in
{ HEAD ~ a pusher } inserted in { TAIL ~ the second housing } for a slide , the pusher being configured to be engaged with the second engagement part , wherein
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH