You have an SCT, so you need a T-Adapter like this http://www.amazon.com/Gosky-Adapter-Schmidt-cassegrains--Attach-Camera/dp/B014179WGA/
And you also have a Nikon, so you need a Nikon T-Ring http://www.amazon.com/Celestron-93402-T-Ring-Camera-Attachment/dp/B0002379UO/
Okay sweet, thanks. So I guess I should buy these?
https://www.optcorp.com/astro-physics-2inch-visual-back-for-standard-rear-cells.html#pquestions-tab
http://www.amazon.com/Gosky-Adapter-Schmidt-cassegrains--Attach-Camera/dp/B014179WGA/