You answered your own questions in the last paragraph, simply run the cabling as you suggest.
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I agree if you have a BluRay with Six Analog Output, use those directly to the Six Channel Input on the 130. You may have to use component video between the BluRay and TV, depending on the players output configuration options. I owned a 130 years ago and it is a fine piece of equipment. What amp are you getting with it?
The 7108 is a 8 channel amp. That would give you an opportunity to bi-amp your front speakers! Or you can bridge that ampo as well for more power.
Here is a link to the manual http://www.berners.ch/McIntosh/Downloads/MC7108_own.pdf
also in case you need one for the MX130