Hey everyone, I’m new to building my own drone and I’ve started running into a problem. When I’m trying to solder on the wires to connect my LiPo batteries, the solder on the pad never melts no matter what i do. The only way it melts is if i hold it to the hottest part of the soldering iron which is thick and hard to use. Any ideas? Also, I’m getting a little confused on the wiring for the receiver. Here are a couple pics. I have the Matek F722-SE and the Spedix GS45 and a XSR receiver.