Procedure for performing Paired T-Test?

Hello, I'm attempting to perform a Paired T-Test on the functional connectivity of two resting state conditions within-subject. I have a Placebo run and a Control run for the subject. First I converted my .nii files to nifti pairs using REST's conversion utility. Then I used the Functional Connectivity tool to create a FC and zFC Map for each condition individually using the same ROI location. Then I placed the zFC maps into their own folders (I have 1 folder for the zFC map from the Placebo run and another folder for the zFC Map from the Control run).