Who has experience in IPC-TM-650 2.6.3.1 Environment test Method

Anyone who has experience in IPC-TM-650 Environment test Method 2.6.3.1?

I have a question. It is the procedure to finish electrical connections. According to 2.6.3.1D, there are apparatus which are solder pot, soldering iron and flux. Then solder a single strand PTFE insulated wire to each pad of the board. My question is, is there any standard step to do it? what is the purpose/different between solder pot and soldering iron? No need solder wire (63/37)? How to use flux, soldering iron, solder pot and flux to finish this electrical connection?

If I use common solder wire (63/37) to connect insulated wire to board by soldering iron, then is it ok?

I need your help thanks for all reading !

reference link http://www.ipc.org/4.0_Knowledge/4.1_Standards/test/2-6_2-6-3-1.pdf

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