vector84
500+ Head-Fier
Assuming (dangerous) that the upgrade cables match the pictures (I don't have them) a too large connector should be an easier fix, I would think?I am definitely gonna need some sort of a way to keep them in, some glue or at least some way to provide more friction on the male connectors' plastic, maybe put a blob of glue there and spread it out.
Funny thing is that silver cables don't even go in properly, the plastic housing stands in the way, and I don't want to plug the pins (as much as I can) and then wiggle it around too much, I am afraid that I will damage the female connectors and this would be a real problem. They want to use plastic casing that goes around the female connector as a friction provider, but if you are going to use that, you need to have a very precise manufacturing there. This is probably the main reason why I'd prefer mmcx at this price, because it's the connector itself that holds it all together. Pins alone obviously aren't enough.
The shoulder on the back side away from the L/R markings should press right up against the housing when fully inserted. Mine all took a fair amount of force to seat completely the first time.
If you definitely can't get it to go in that far, you could gently "adjust" the plug to fit. If you only need a very small amount of clearance, you might be able to gently polish the plug into shape with a hard object or a hard edge. If you need more clearance you might have to consider something more aggressive, but often all it takes is a gentle pass with a fingernail along the edge of a plastic connector to get it to mate properly.