What is your drive arrangement, now? Are you still booting off of C and it is still a hard-drive with the SSD being a secondary drive letter, like E:, or did you use the move-OS-and-Programs utility that might have come with the SSD to make the SSD as your C: drive and the photos are on the old boot drive that is now a secondary drive letter like E:?
If your SSD is E: then your photos will still be the same place they always were and you can just open your catalog.
if your SSD is now bootable C: then your photos will be on the same hard-drive with a new designation, so you have to do right-click Locate Missing Folder in LR Library's Folder panel for each top-level folder.