A:AnswerWith a 700 watt power supply you should be able to power a GTX 1650 with the 6 pin power connector. I have the system running a GTX 1660TI with no problems.
A:AnswerYes, it seems you are going to have to do that. This power supply is made for the newer motherboards where most of them have a 3x2 plug-in but it will work just fine if you split them apart.
A:AnswerJump the Black and Green wires with paper clip use the back side of the connector power supply should turn on and you can check Voltage on the other wires
I have done this many times