EPISODE 28: Trailer Tool Box Install and Review - Sheet Metal Screws?

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In todays video we look at installing a new trailer toolbox on the tongue. Will it work? should it have been metal? The install starts very well and goes down hill.
The box I do like but I have my reservations about using sheet metal screws.
There is plenty of room for tow straps, jacks, chocks, and more in the Dee Zee DZ 91717P - Dee Zee Specialty Series Triangle Trailer Toolboxes

https://www.summitracing.com/parts/DZZ-DZ91717P

Would you get a box like this for a trailer? What do you think of using sheet metal screws to attach this, or would you use something else?
Let me know your thoughts?