Drill it then run threaded rod through it.
I repaired my tree that looked EXACTLY like yours 5 years ago.

(Not mine but what it looks like)
I used 3 rods. One at the very bottom of the split. One at the point where the split was. Then one about a foot higher. It has survived through wind storms and winters no problem. The tree has actually started to grow around the washers/nuts now and healed itself at the split. It's amazing.
Don't use any kind of ratchet strap. They don't do a damn thing. They stretch from the forces involved. I'd only recommend using the ratchet if you want to stabilize while drilling. I can get you some pictures if you want to see how mine looks. Just PM me your number and I'll text you some.