Option in adding a second HDD to an Inspiron 17R-5720

I have read a number of questions and responses to this question and surprisingly none of them says exactly what has to be done in order to accomplish this. Some mention the addition of the mSATA card and a 32gb SSD, yet there is apparently no connections in the 2nd drive bay on the 5720 models? My Grandson is bringing me his unit to see what can be done. I just want to have an idea of what to expect and where I might get these parts if necessary. Also would there be any problems in using a 1TB 7200rpm drive or a single "hybrid" drive?