How to get tee off on a Kohler Revival Wide Spread Faucet

I am trying a DIY project -- first time replacing a bathroom faucet. It is a Kohler Revival and I am having a devil of a time getting the tee separated from the main spout. I can't seem to get any leverage to turn it, and there doesn't seem to be anything "wrenchable" on it.

Any suggestions?

Thanks!

I have not worked on a Revival, but with some faucets the tee does not come off.