...but here is a partial view of the chassis, and the wiring in question:
...and a close up of how they attach to the terminal strip:
The green wire (looks blue in the photo, sorry) is for the ferrite antenna (which the power cord is also phased) the white the ground lead.
Here's a close up of the rectifier...not sure if it is original or not:
I wanted pull the chassis completely away from the radio and remove the bottom so you could see underneath, but this one has the speaker leads soldered and I didn't want to melt or cut them. If you need to see under there, let me know and I'll grab other radio.
Hope you get it working soon! The C730 is a wonderful radio; a real listening 'friend' if there ever was one.