Looking for a little help with the size and shape

1) Appears from the photo attached (originally posted by Barry) some time back the rubber block on the end of the cable is a "D" shape?? Can someone with an original confirm?

2) What is the length, width, and depth (if D shape, diameter with and without the flat)

3) Also looking to get the negative cable Dia.

Thanks in advance

Edited to remove the pic