Hello,
The three wires of my servo just got disconnected from the pcb ...and I don't know which wire will go in which of the three soldered joints ..Please help me ( I have a tgy 1370a micro servo) I am kind of scared that if I  make the wrong connections then the servo might catch fire.. so.
People with experience please reply 

just care about the positive wire, others doesn't matter if swapped, please post a picture.

also positive and negative usually have a capacitor in between them.

i will like to add what akhil told usually the ground has the biggest amount of pcb track so look for the 2 pins with biggest pcb track and and capacitor. est can best help with a photo