Apple Power Macintosh 7300 series - PC Compatibility Card - Manual (Page 113)

16 Pull the cable through the hole in the chassis and set it aside.
Don’t force the cable. If it resists, jiggle it or feed it back through the hole and
try pulling it loose again.
Keep this cable; you will need to reinstall it if you remove your PC
Compatibility Card again.
Pull the disconnected CD cable through
this hole in the computer chassis.
113 Reinstalling the PC Compatibility Card in Your Power Macintosh 7300 Computer