I've never done it myself but the pictures and videos I remember seem to still tie a marlinspike hitch but use the carabiner instead of a toggle. Then you can clip the whoopie into the carabiner. I might poke around and look for a video.
Edit:
Oh, you would want to use a climbing rated carabiner because you are now pulling on it and not just compressing the toggle like you do when looping over the knot.
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