This manual was very clear and complete, the prices can't be beat, great to have older manuals available!
Text excerpt from page 6 (click to view)
XR-A880, XR-A770
2.2 EXTERIOR (1/2)
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KUCXJ Type only Note : Hook Tray cap on top of loading tray and then insert the bottom three hooks. Note : Attatch on the same numbers � three. 12 Refer to "2.5 $M MECHANISM CD". 2 11