Link to your individual collections by creating a new linklist in the Navigation section of the admin.
You can then have it appear here by choosing your new linklist under Customize Theme / Sidebar.

850951 ELECTRODE HEAT RESIST STEEL, LOW HYDROGEN 1.25%CR-0.5%MO,IMPA
IMPA 850951 ELECTRODE HEAT RESIST STEEL, LOW HYDROGEN 1.25%CR-0.5%MO