Long tima ago,
I tried hard to find anything on line in pdf format without success... I suggest check in this link toe 10x12 Instructional Assembly guide, could be helpfull.
If you've already figured it out, you might add that detail.
The canopy, bing canvas or
cotton duck perhaps should have sleeves (Rod Pockets) The rods may be tapered at one end, slipping together tor form the 10 ft.
There should be at least 4 of some type of connector in the package
that should allow the canopy support rods to connect with whatever the
Leg Rods are.
If the roof is peaked it may also have rod pockest and a center
connect device as well as other connectors that support the roof to the
canopy frame, or again to a multi socket corner connector that allows
multiple pipes to be plugged into it.
Without any pics, and/or the fact that no description for
instructions to assemble seems available, it may also be that the
company is out of business, hence Big Lots has the inventory.
Hope this helps.