F M J trailer hitch Info?

Does anyone have a frame hitch on their Volare/ aspen / Dippy / Gran Fury?

I want to put one on my 79 Aspen wagon.

I bought an NOS Algonquin mfg hitch ( prolly made in canada in the 80's) receiver for the wagon.. it's missing some parts so I wanted to see if anyone had one installed and could share some pics of the mounting points?
It also has a goofy 1 5/8" receiver tube that I am going to replace with a 2" tube.

Thanks for any help!
Author: slant six