Understanding different injector connector types WRX / JZX / JECS / SARD / Denso / USCAR / Jetronic

I need to change the injector connector on both my WRX and JZX 90 to suit the new injectors.
By understanding the original type of connectors they have. You can either get a male to female adapter or just replace the existing connector with the correct one for your type of injector.
* fun fact: when the auto electrician ordered Denso connectors for my sard 850cc side feed injectors, he actually ordered low guide that suit WRX, when he needed high guide that suit the JZX injectors.