HELP I CANNOT FIND THE OBD DIAGNOSTIC SOCKET IN MY HONDA ACCORD 2000 MODEL,?

HELP !!!! NEED TO FIND THE OBD DIAGNOSTIC SOCKET FOR MY 2000 HONDA ACCORD 1.8VTEC, ENGINE CHECK LIGHT HAS COME ON AFTER I REPLACED THE ENGINE, ITS AN AUTOMATIC AND D4 LIGHTS KEEP FLASHING, ASWELL AS ENGINE CHECK MANAGEMENT LIGHT TOO, CAR CRAWLS IN DRIVE, BUT MOVES BETTER IN MANUAL MODE. ANY IDEAS WHERE THE SOCKET IS OR HOW I CAN CLEAR THE CHECK LIGHTS?