Maybe this is what you were looking at. Look at all the red and blue wires, and those great big metal plates on the capacitors. All the high currents are handled well by very tidy and short wiring.
As others have commented, the ribbon is probably there for power on/power off signals (not current), and perhaps some turn on sequencing. None of it appears to be in the way of the audio signal, though I could be mistaken and even then, if properly selected, would be fine. So for instance, there might be a push button on the front panel, or meters, or even source selectors. All just fine for ribbons that are not carrying significant current or audio signals.
A good amplifier circuit is usually supported by some sort of relays to ensure the amplifier has stabilized before the speakers are connected, external turn on/turn off jacks, etc.
