That is the can-bus connector used by the mini iOSD. Here's a photo of mine installed inside the shell.
View attachment 25485
The other one on the back leg is the compass.
Where have I seen that Picture before? Oscar yer in good hands w/ Jason I have carbon fiber props and I also have the stock props. The carbon fiber are MUCH stiffer I don't mean a little I mean a whole bunch. the plastic stock props by holding them at the center and pressing on the blade tip and bending it has over a 1.5+ deflection. The Carbon Fiber has a 1/2" and that's about it. They also have much more side deflection. That being said the prop is an airfoil, and is designed to provide the best thrust by its design, If it bends and doesn't maintain its designed shape then it will not provide the most thrust. Now something else to consider. the P2v1 has smaller motors and lighter esc's. Being the new blades are longer and wider and have a greater pitch. that will increase the amperage and strain on those parts. Will it burn them out? I dunno but I have heard it both ways. When DJI upgraded the P2v2 with the new blades they also did the same with then mtr's and esc's. Ask yourself why did they do that? They did it for a reason. Do you think they care if you dust an esc or mtr. I'd say NOPE! Like you I am a relatively new Pilot but I I didn't get off the turnip truck yesterday. In my past career I have many years of dealing with air flow and motors. Being a newbie in quads I have been doing a Whole Bunch Of Research and reading. I'm lazy. Sometimes Ill ask a question on the forum and many times I get an answer and some times I don't get an answer, and I end up finding the answer or solve the problem myself. You like me have been helped very much by Jason it is members like him who are willing to help that are invaluable to this forum. I asked the same question on Batteries that you did and got some good answers. In the meantime I have been doing some reading. Here is a link on Battery charging and maintenance and other links. There is many on the subject just do a google and you will find many.
Take care and good luck.
~Duke
http://wiki.dji.com/en/index.php/Phantom_2-Preparing_the_Flight_Battery
https://www.phantomhelp.com/?src=pps