The Aeco website shows two types of soldering.
https://www.youtube.com/watch?v=6KyEuo3SEzI
This way, you should not expose the plastic body to too much heat, because it softens slightly with heat.
https://www.youtube.com/watch?v=Cnm197OjIaI
This way, after soldering, the + and - poles will not be exactly in place in the plastic body.
However, if you have to solder the shielding as a third conductor, it will be a big pain.
And there is another strange thing. I have to plug the assembled RCA plugs into Aeco ARJ-4045S sockets, but it only fits so tightly that I am afraid that one of parts will break.
https://www.aeco.tw/products/arj-4045s