Click the ⚙️ and it will take you to the NWC string then just paste that into the Nostr app. I’ve been testing it with Damus and it seems to be working well. 
Does anybody know how to connect a nostr:npub1h2qfjpnxau9k7ja9qkf50043xfpfy8j5v60xsqryef64y44puwnq28w8ch Lightning wallet to Nostr with NWC? #asknostr
Discussion
I have the NWC string but I don't know where to add it in Primal, Ditto or Amethyst.
Primal I don’t think you can use your own wallet. Ditto I’m not familiar with.
Amethyst I think you long press the Zap button on a note to get the menu to come up. I think that’s right, it’s been a awhile since I’ve done it but I remembered it being hard to find and finding it on accident.
Oh,now it worked somehow. Didn't work a few hours ago.