Select Apple from the SHSH Repository dropdown if you just want to query Apple for your SHSH and save it locally. Select Saurik - Cydia from the SHSH Repository dropdown if you want to check Cydia for your SHSH and if Cydia doesn't have it, it will be stored there.
Click the Submit button to continue.
Once The Firmware Umbrella has completed you will see a status message indicating the SHSH was saved.
Notice a .shsh file will be created in the folder on your desktop. Make sure to save this for future use.