Un-soldering would be less difficult and safer. Those connectors are solid brass. Or drill a third hole in the bracket for the n-fuse pigtail.
I also discovered that this card does not provide usb ports as @nestorayuso believed. It must be connected to a usb pin header on the motherboard. One port is connected to the mini-pcie socket and the other is connected to the usb socket on the adaptor. So this card would occupy a pcie slot in my server but not use it in any way, and it would also occupy a usb header from the motherboard.
I no longer think that this adaptor card would be a simple or neat solution. I will research other cards. But if none can be found (at reasonable price) then the external usb adaptor offered by n-fuse may be a more neat and simple solution.