cam lock 62 is shown to have an upper ramp 64 and a lower ramp 66 that are inclined so there is an increasing taper extending from end 68 back to the hex socket 60 in contrast the f locking connector on panel 12 a is shown to include an upper abutment 70 and a lower abutment 72 for an engagement between an m and an f locking connector the connectors need to first be juxtaposed with each other this can be accomplished in any of several ways for instance either side edges 32 34 of panels 12 are juxtaposed to each other e g see fig3 ceiling panels 14 and floor panels 16 are respectively juxtaposed see fig2 a corner connection 26 is juxtaposed with a side edge 32 34 of a panel 12 e g see fig4 a ceiling attachment 28 is juxtaposed with the top edge 36 of a panel 12 or with a ceiling panel 14 or the bottom edge 38 of a panel 12 is juxtaposed with a floor panel 16 in each case it is important that an m locking connector be positioned opposite an f locking connector once an m and an f locking connector have been properly positioned with each other as indicated above the hex head 52 of tool 50 is inserted into the hex socket 60 the tool 50 is then turned in the direction of arrow 74.