Should i bend the connector's solder tabs outwards to get a little room for it?
I just completed my micro damper assembly and had to do exactly this to make things fit.
I wired mine up last night and found it was a much easier fit if you removed the "wings" off the servo
I removed the tab on the side facing the wire/mounting hole. I left the other intact as it allowed the servo to snap very securely into place. I was surprised at needing to do this as I was under the impression that the servos sold through microdamper.com came pre-trimmed.
Fan wires:
Don't cut the fan wires too short. You'll have less to have to coil out of the way but it's not worth the hassle. Do the soldering with the two halves next to each other and deal with the resulting length.
And my biggest tip:
Don't solder a TRRS plug onto cat5, crimp an RJ45 plug onto a 4-pole cable.
After being frustrated soldering the 3.5mm plug onto a piece of cat5, I realized I could more easily solve the problem from the other direction. I bought a coiled 3.5mm TRRS extension cable, cut off the appropriate end, and then crimped an RJ45 plug onto it. Only takes a minute with a multimeter to identify which wire corresponds to which position on the plug -- and then just a few seconds to insert the wires into the RJ45 and crimp. Far easier and quicker than soldering the other end, provided you already own a crimp tool.
Bonus - the coiled cable is far more compact (partly because it's only 4-wire, partly from being coiled like phone cords used to be) and easier to store.