eye splice in bight of 3-strand?

[Petedd]

Anyone have any instructions on how to make an eye splice in the bight of a 3-strand line?

What I am wanting to do is to make an anchoring bridle with a thimble in the middle of an 80-foot long run of 3./4" 3-strand nylon rope - much like the bridle offered by Mantus here: http://mantusanchors.com/mantus-bridle/

Thanks!