|Insert a needle threader through each needle eye BEFORE inserting the twin needle into the machine. Very easy peasy. Push a wire loop threader through each eye, from back to front. Push the loops slightly apart if they want to overlap. Insert the needle into the shaft and tighten. Thread each loop and pull it through, front to back.
By inserting the needle threaders before inserting the needle in the machine, you can hold the needle as close as needed to easily see to insert the threaders.