Trailer Hitch

This came on my Dart when purchased in 1973

View attachment 1715698509
So it looks like it bolts to the bumper
And floor pan?
Was it bolted outside or inside the
Bumper?
What year is the Dart it came off of?
Sorry for all the questions just making sure that would work.
I have a 18' flat bottom race boat
I want to tow, it only has about 100 lbs
Tongue weight, and weighs 2000 lbs
Thank you