How to download classic War3 after preorder of reforged?

It says on the preorder page that the preorder gives “instant access to classic Warcraft® III (Reign of Chaos® and The Frozen Throne®)”
However, where can I download the client? I tried my battle.net games page but didn’t find it.

There’s a link this in thread: 1.30.2 Patch Notes

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Thank you! That works