Just wonder if there is an alternative solder point on the Zephyr mainboard to solder this point? On the Zephyr it won't stick because there is no solder on the point? However on Jasper's there is solder on the point.
If you dont want to do that, you can follow the trace to the next point and solder there, using a wire.
The better question is, why can't you solder to the point? Solder not on the point is not a problem as simply heating up the pad and adding solder will add solder to that point, unless you messed it up?