I'm totally aware that the reason behind your post might be rooted in your curiosity to just see if you could get Wordpad to work in Wine. If that's the case, I get it. And if you do get it to work, I'll be paying attention. But in case that's not your motive, I'll add the following:
To me, Leafpad is more similar to Notepad than Wordpad. I have not tried to install Wordpad in Wine or know if there is even an option for it. If you want a lightweight word processor Linux option to Wordpad, and for some reason you didn't want to use LibreOffice Writer, you might want to consider Abiword. From my experience, the apps built for Linux have much better performance.
Lastly, if you can open Wordpad in a terminal, then that's not the only way to open it. You could Create a Launcher/Shortcut for it.