Your brother may have a boot. That doesn't mean it will work on your deck. Some decks are very sensitive to the boot you use. If it's not compatible, it will clog. Use this link for a reference:
https://www.google.com/search?q=leaf...mVBiEQ_AUIBygC
You don't say which Trac Vac model your brother has. Use this link for a reference:
https://www.google.com/search?q=leaf...ch&q=trac+vac+
I have an EZ VAc and it hitches to the tractor like this.
http://www.mytractorforum.com/attach...1&d=1383430812