The NWC connect string was copy/pasted directly frokm Cashu without alteration. It looks like this:

nostr+walletconnect://c6287894d0731059634ba912930f4557dd41ca7be1f32d6cacf398288125e361?relay=wss://relay.primal.net&relay=wss://relay.damus.io&relay=wss://relay.8333.space/&relay=wss://nos.lol&secret=