I just bought a used 2010 Prius II. On the back of the rear seat, there are 3 latches (I'm not sure what they are called or of their purpose). One of three plastic covering is missing. I've highlighted the missing part in red. Would someone please kindly tell me part number or description so I may buy a replacement. Thanks in advance.
Can't help with the covers, but those are the anchors for the top tether of child seats - oddly enough, called the LATCH system.
http://www.toyota.com/t3Portal/document/om/OM47668U/pdf/sec_01-08.pdf page 28 of the PDF calls them Anchor Brackets Page 35 hints what is missing is the Anchor Bracket Cover This may be it COVER, REAR SEAT BACK, LH; COVER, REAR SEAT BACK, RH. TOYOTA Prius 1800CC 16-VALVE DOHC EFI, AUTOMATIC, ATM STEPLESS (2010 - 2012) # 7299647030B0