I preprocessed resting state fMRI data (all the basic steps from slice time correction to smoothing) using SPM12.

I am interested in performing seed based voxel-wise functional connectivity where I wanted to define a seed at co-ordinates (x, y, z) and further display the functional connectivity maps on surface of the brain?

I would really appreciate if some one could please guide me how can I proceed from preprocessed fMRI data to surface based functional connectivity maps?

Thanks,

MJ