Install Tidal on both the Windows PC and your iPad. Make sure Media Center on the PC has the WDM option enabled. Configure Tidal on the PC to use the WDM sound "device". Configure Tidal on the iPad to play via Tidal on the PC.
It's been a while since I left Tidal for Spotify. I know you can run Spotify like this, but I can't remember if Tidal lets you direct the output to other Tidal instances on your network. When I used Tidal I also had BubbleUPnP on my Android device. Bubble can connect to Tidal and let you play through DLNA renderers, such as MC. If you use Bubble you don't need the WDM driver on your Windows PC. You don't need the Bubble server running anywhere either. It worked pretty well, and if you're interested you can set up playlists using content from your local library mixed with content from Tidal. It's a paid app, but definitely worth the cost if you want to play Tidal content through Media Center.
I had the Mconnect app on an old iPad. It was slow and inconsistent. Sometimes I could make it connect to Tidal, other times I could not. I would recommend Bubble if you can use it.