You know how to splice? Great, that makes this much simpler:
I think Samson suggests 72 times the diameter, which is 3.5 fids, and a taper on alternating fifth and sixth pairs; look that info up to verify it, because it might be a fever dream on my part. Fids are handy for measuring, but you don't need one on Dyneema; cut the taper and then wrap it with tape, spiraling towards the point, and use that as your fid. Bury the taper into the core of the line further than you think you need, cinch the eye tight around the thimble, pull the tape, strip the taper into the core, milk the splice down, and set it HARD; like, go rig a strap around a telephone pole and use the winch to slowly build tension on the splice. Once it's set, that's it; you're basically done. If you run chafing gear on the line, either install it BEFORE you splice, or pull the entire line and slide it on from the rear; if you run it from the rear with the line off the spool, it's a good time to wash the line and fluff it up a bit before you respool it. You can also run a separate sleeve of chafe guard around the line at the spool to keep the heat off the line...or just wrap the spool itself. It's a good time to shorten your line, too, if need be.