I just moved and I didn't pack. I found the printer in one box and this orange part in a different one:
I can see 4 nozzles spaced the exact same distance as the cartriges when they go in. I've never seen this piece in my life before and I don't know where it came from. Any ideas?
Here are 2 more pictures:
The printer is a Brother MFC-J5910DW. I haven't turned it on since the move just in case.