I'm pretty sure this is the part number Motorcraft WC9329D (Positive Battery Cable) about $100.
You can also replace just the cable end with a "Military Ordinance" battery terminal end.
The military terminals are designed to accept multiple cable leads.
I purchased this terminal, the one in the picture, at NAPA over 10 years ago.....still working
I twisted mine off. I got a screw on post type, drilled and tapped a hole into the block of the old one and screwed her in. Not pretty like the above but it works.