Polarity is important,So I just laid the old and New side by side exactly the same and changed one wire at a time. Safestest way I know.
In My case the wires were very brittle and anealed from heat and had to be shortened and new stake-ons applied. Crimping is good but adding solder is better.
A pair of 10-12 closed stake-ons would nice in the kit. 10= screw hole. 12=wire size.