Both will use lollipop stick antennas. ADSB (box mounted on sub panel pilot side) went to fuselage floor 2 inches aft of firewall and 2 3/8 from side wall. Transponder (box mounted on co pilot side forward of subpanel) went to identical location on that side of the floor. I Powered on and watched ADSB shows me aircraft flying near KCRG 5 miles away from my garage. Mind you, the airplane is in the garage. Very cool. Transponder needs a hex code before I see what its doing. I wonder if I can get that early.... Added couple Adel clamps to secure RG400 in upper corners on each side. I have a small coiled amount on each side. I am uncertain if I will cut and put new connector on so i have straight run with no extra length. I'll do some homework on that one.