These are 6 additional connectors for Alantik Notebook Power Supply. Among the connectors there are also the one for Dell and for the new HP and Lenovo.

CONNECTORS

M9 7.4x5.0mm 19.5V Dell
M10 3 holes 20.0V Dell
M11 7.9x5.4mm 20.0V IBM, Lenovo
M12 7.4x5.0mm 18.5V Compaq, HP
M28 square 20.0V Lenovo
M29 4.5x3.0mm 19.5V HP