How to connect Oppo BDP 95 and Mcintosh MX136

Thank you very much.
Only 2 rca cable from Oppo to Mcintosh are not enough?

Two are appropriate for stereo. More for multichannel. Since you asked about surround, the latter would be needed.

if your MX -136 does not have multi channel RCA input, then you need to use the MX-136 HDMI input from the Oppo in order to get surround sound.
The Oppo's 2 RCA outs are for the audiophile stereo only section of the Oppo and will not get you multi channel sound.

Thank you

1. As you can see from my post, the MX136 has a mch analog input.
2. The MX136 ha no audio capabilities on its HDMI inputs.

It is a rather older device.