Trinitron Lost Green

[N2IXK]

Hobbyist volume soldering indoors nothing to worry about. If the flux smoke bothers you, open a window or use a fan.

Soldering a female at the monitor not a great idea, IMHO. Unless you actually install the connector into the case/chassis. Putting it on a stub of cord is harder to do mechanically, and will transfer extra load to the strain relief at the monitor housing, which can/will cause another cable failure if flexed too much.

You could certainly replace the entire cable if you have an EXACT replacement scavenged from another monitor of the same type/brand. There is no "standard" as to the types/number/pinouts of the connector(s) INSIDE the monitor.