Also, when creating wire wrap circuits (https://en.wikipedia.org/wiki/Wire_wrap https://en.wikipedia.org/wiki/Wire_wrap) one works from the underside of the boa

Also, when creating wire wrap circuits (https://en.wikipedia.org/wiki/Wire_wrap https://en.wikipedia.org/wiki/Wire_wrap) one works from the underside of the board, so the underside pin numbering image shown in the webpage is the pin numbering one follows while wire wrapping a circuit.