I have a bent whip radio antenna on the bottom of the fuse, RH side. The transponder antenna is on the bottom of the fuse, LH side. Both work very well. They are mounted on the two antenna mount plates that come standard on the SS7 fuse. My GPS antenna puck is mounted on the top side just behind the turtle deck. It also works great, looking up at the satellites in the sky. My ADS_B IN antenna is on the bottom of the fuse, in the center, just behind the stainless steel firewall piece that is bent back along the bottom.

Even though everything works fine where they are now, if I were to do it again I would mount the GPS puck inside, under the turtle deck, looking up. The comm antenna would go in the classic location on topside behind the turtle deck, and the ADS_B IN antenna would go on the bottom antenna pad, RH side.