Hello Shaun,
Thanks for being in touch with the forum.
I don’t think I’m going to be of much help to you, except to introduce the possibility of the need for caution.
It is possible ( but I’m not sure) that the actual receiver - anchor as you call it- may not be as simple as you would imaging it to be, and may be part of a cylindrical gas operated pre-tensioner which deploys in the event of an accident, and simply disconnecting it may not be be what you want to do, without investigation and advice beyond my direct experience with this.
Kind regards,
Gareth.