Totem Q380 and Simonk 20A Esc

Hey! I`m new for my first build of Quadcopter Totem Q380 with Pdb.
My quetion is…

  1. How to Soldering XT60 to the pdb board?
  2. How to connect Gps Module Bn880 and Bn880 Compass to Apm 2.8?
  3. Why i can not Calibrate Ebay Cheap Red Wrap Esc with Fc and Devo F7?

Please help and Thousand Thanks