Replace missing Generator Transfer panel Interlock Link

this is the replacement of the interlock link gone missing from a Square D Load Center Cat no. CQO4-8M30DS-GP , 30 amp , 120/240 volt ,1 phase panel.
The link part QO2DTI and it cost me 47.86 Canadian this device is respired if tend to feed power from outside normal electrical feed , this device prevents power from the generator from back feeding to main power grid and harming electrical line worker on storm damage power lines. item was bought off Ebay and it`s approved Square D part.
More Tractor Techno -https://www.youtube.com/watch?v=o41A91X5pns

Видео Replace missing Generator Transfer panel Interlock Link канала 45NUTS