The other "wingtips" are Antennas, usually UHF and VHF antenna for Radio comunications and navigation. One of those antenna could be the antenna for the IFF (Identify Friend or Foe) system. The 2 black tubes by the cockpit are pitot tubes used to gather static and dynamic air preasure for use in determining airspeed...
Spent 20 years woking on the boxes connected to the other end of those antennas...
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