After unpacking the M200, there was a white strip dangling in the front open space of the machine. It looks like a strip of soldered bits stuck to a plastic strip and contained in a half-tube of silicone. One end is fastened by black tape and then to a series of thin black wires. The other end is just cut with 3 metal prongs.
I have a bad feeling that this was cut during shipment.
This is just the led strip that got loose after assembly, prabably during transport. If the black tape still sticks you can just stick it back on the printer and you should be all set.
I may be wrong but that looks like the LED light strip that is in the top front section of the printer. Mine was hanging off slightly at the end but I pressed it back onto the adhesive and it seems ok now. I don’t think it will prevent the printer from working, try contacting your reseller and they can advise on how to make it stick. You may be able to use Velcro strips or something like that as well