Origin is a special, F-ed up case.
You cannot install origin to a drive other than your C: drive, because it's one of the worst designed things in the software world. It's part of the reason I hate EA; I have a number of games on origin that I haven't touched in a long time because I have an SSD.
That being said, if you can, return the SSD you just bought. It's pointless.
Most games get absolutely zero benefit from being on an SSD. Think about it - if you put CoD on an SSD, what do you get? You load into a map first; big whoop. You still have to wait for everyone else to load before you can start the match. The only games that gain anything from being on an SSD are MMOs (because it gets rid of loading screens, and that's only a convenience) and certain single player games (because it gets rid of loading screens that break immersion.)