You have what is called a "cold solder connection". You would probably get away with it but lets work on improving it. First let's repair the one you've done. Place the wire back in the vise like in pic #8. Clamp VERY lightly so not to crush. Apply heat to the connector and NOT to the wire until you see the solder flow smooth and shiney. Remove heat and DO NOT TOUCH until it cools on its own. Do not even breathe on it.

Biggest problem is that it appears that you did NOT tin the wire before you started soldering the assy and kept GLOBBING solder on the mess. You need to strip the wire like you did and then put in the vise without the plug. Apply heat carefully to the end of the wire until hot enough to melt solder when it touches the WIRE and not the iron. Let just enough solder flow into the wire to fill the strands and not build up the diameter. Apply connector parts as needed. Apply heat to the connector as above until it will melt solder applied at the rear of the connector where the wire enters. Apply just enough solder to fill cavity. Let cool as above without touching.

You should be done (after final assy of connector parts).

This is a learned skill that you will NOT get right the first time. I've been doing it for 40 years now and it's so automatic that it's hard to teach it.