Not a docking connector: charging contacts.
See page 29 of the service manual here: http://www.applerepairmanuals.com/the_manuals_are_in_here/iB...
(No third-party charger that used them was ever released AFAICT.)
See page 29 of the service manual here: http://www.applerepairmanuals.com/the_manuals_are_in_here/iB...
(No third-party charger that used them was ever released AFAICT.)
In the underside photo here, it's CP1 and CP2: https://davidigreen.com/blog/ibook-g3-clamshell-logic-board-...