I have taken soft screws that fit the blind nut cut off the head of the bolt and drill out a small hole through the centre of the remaining thread. solder a length of flex cable in the hole. Be sure to keep the threads free of solder. The thread should be long enough to pass through the hole with some thread on the outside. Feed a string/wire/flexible tube or another wire through the hole and to a place where the flexable wire in the thread can be connected and pull back through the hole until the blind nut is lined up with the hole and the threads are showing. Feed a washer then nut over the wire onto the thread and tighten until the blind nut sinks into the wood on the other side. Remove the nut,washer and short threaded adaptor from the blind nut and insert the intended screw in the the blind nut. Once you have a set of these made up you will wonder what you did without them.

Dennis