I’ve seen it for sale on Amazon (for other trucks but exact same thing) if you want to see some videos of it in use.

EDIT: I guess I won't be so lazy and actually provide an example link: https://www.amazon.com/UnderCover-SwingCase-Storage-SC200D-1999-2016/dp/B001B7VSOS/ref=sr_1_3?crid=1DD48KRKXQO5P&dchild=1&keywords=swing+out+toolbox&qid=1635797599&sprefix=swing+out+toolbox%2Caps%2C97&sr=8-3