What does the wishbone symbol mean?
pin &amp; socket interfaces are shown with 


"> and >"  or 
"&lt; and &lt; "  with interface showing type by intuition or
in this case socket and pin number
where J is for Jack , now unisexually called Receptacle meaning fixed connector because for other reasons and this Jack is "Female" or S=Socket
where P is for Plug, meaning moving connector.