tire chains

Seen a couple of way to go about filling them, but my plan is to drill 1/2" hole on the rims and weld a 1/2" coupling, use that to fill them and then put a cap on them. To me that would be the easiest way to go about it. Lay tire and rim on side and fill tire through coupling, any thoughts are...

I have a set of two link tire chains don't appear to of ever been installed on a tractor. They came with a john deere tractor a co-work bought new and never used the chains Fit 23x10.50-12. $40.00 Located in Battle Creek,Mi