Apple Power Macintosh 7300 series - PC Compatibility Card - Manual (Page 115)

18 Route the cable over the top of the PC Compatibility Card, behind the processor card,
and around the back of the Macintosh logic board. Then plug the cable into the audio
connector on the logic board.
Be sure you route the cable between the processor card and the back panel
(not over the top of the processor card).
Keep the cable away from the heat sink and center support post.
Insert the cable’s larger plug into the CD audio connector on the logic board,
where you unplugged the ribbon cable in step 15.
Processor card
Route the cable around the back
of the computer’s interior as shown.
Support post
115 Reinstalling the PC Compatibility Card in Your Power Macintosh 7300 Computer