You need access to the tls.cert file as the admin.macaroon file, no dependencies required. Concatenate both files and convert macaroon to base64 and feed into whatever lndconnect compatible application.

Reference (w/qrencode to create QRs):

echo 'lndconnect://example.com?cert='"`grep -v 'CERTIFICATE' tls.cert | tr -d '=' | tr '/+' '_-'`"'&macaroon='"`base64 admin.macaroon | tr -d '=' | tr '/+' '_-'`" | tr -d '\n' | qrencode -o /tmp/out.png