Mir base block (center), Kvant (right), Kvant 2 (top), and Kristall (bottom) (1990) κλίπαρτ

Note the EVA mooring post for YMK tests near Kvant 2’s EVA airlock hatch. It was added during a January 26, 1990 EVA. Soyuz-TM and Progress vehicles are omitted for clarity.