It has drill attachment but where does it attached to? I tried over the nuts
And the pin, but the chuck wouldn’t hold it? Am I missing something?

Goes in the end of a drill like the first pic. Did you loosen the thumb screw?

Thanks. No problem with the thumbscrew. Snake does uncoiled and it feeds out. The problem is the coreless drill chuck doesn't grasp enough of a secure grip on the two nuts and the pin

Do you mean it slips while engaged? You should be able to tighten the chuck down more securely.

Okay thanks