Motor connections on a 18.97

the problem I have is that the small 3.5mm plugs keep comming out from the speedo after landing from jumps.
I have replaced the cages on the plugs but they still slip out in the end.
It is now a couple of years old so I guess there has been some wear to the tubes.
Q: Is it possible to solder the wires in, or will the heat damage something else on the board??