Spectra lifeline confusion

[SV Papillon]

I think it sounds like you want to get a eye splice with only one end availble? If you are using 12 strand spectra you can always do a tucked splice vs buried or a mobius brummel but it would require a shackle. A tucked splice is just as strong as a buried one and can look quite nice if you take your time. There are instructions on several web sites.

Jake