How to go about adding Mandarins to "Kama Citra Session IPA"

So I just recently got done with my 2nd brew which was the Kama Citra Session IPA recipe kit. Turned out AMAZING! But, I have a mandarin tree @ home and thought adding some to the next batch with this recipe kit would be a great idea. Here’s the problem, Im still new to brewing & don’t know where to start.
Would I squeeze the juice out & just add the pulp? Or should I add whole slices in a muslin sock? Help out a noob here please!
Thank you!