Simply?á(1) open the flap and SlimlockÔÇ× camlock?á(the metal attachment), insert your end pin jack through the larger hole,?á(2) pull the strap so your end pin jack seats itself into the smaller hole beneath, and finally close the SlimlockÔÇ× bracket?áand flap and?á(3) plug your guitars cable into the jack socket through the strap. (SEE DIAGRAM ABOVE)