Using preprocessed files from SPM

Hello,

I have some past rs-fmri data which has been given to me which has previously been preprocessed in SPM8. The functional images have been normalized to MNI space and are slice-time corrected. The structural images have been normalized and have output files (seg_inv_sn.mat and seg_sn.mat) which I am not sure what to do with in CONN. How would I continue preprocessing with these files -- is there a way to import them? I see that I can import SPM files using the import tool, but it does not seem to work for .mat files.

Thanks,
Jasmine