The wiring was made from fine strands of copper wire, and the "ties" are paint.
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In case you're wondering about the colors, I got them from this walkaround of the NASM's bird. If they'rte incorrect, then so am I. I can think of worse things than being as inaccurate as the Smithsonian !
http://aircraftwalkaround.hobbyvista.com/me262/me262.htm
Thanks for letting me share my work with you !