The lengths of the first and second toggle links 94 and 98 are chosen so that when {TAIL ~ the first and second arms} 70 and 72 and their respective handles 86 and 90 are in the position shown in FIG 3, the free end of the first toggle link 94 may be pivoted toward the second arm 72 and its opening 102 slipped over {HEAD ~ the head} of the shoulder screw 104 
The lengths of the first and second toggle links 94 and 98 are chosen so that when { TAIL ~ the first and second arms } 70 and 72 and their respective handles 86 and 90 are in the position shown in FIG 3 , the free end of the first toggle link 94 may be pivoted toward the second arm 72 and its opening 102 slipped over { HEAD ~ the head } of the shoulder screw 104
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