I bought a Beomaster 5000 (type 2323) and master control panel and just play vinyl with it 2.0 style. I have always wanted to try a McIntosh system or in this case amp, and I have a pal that had one sitting around not being used and offered to let me take it for a test drive. But he discovered it was a "MC300 Power Amplifier" only and as we know is of the component design and needs to use a pre-amp to deliver the power to my speakers to play. I don't currently own one but he did some exploring on the web of the back panal of my B&O  receiver model,  because we live in different cities, and he noticed there were a couple pairs of "jumpers" on the panel and he assumed that was some external pre-amp wiring and that the amp built into my B&O could probably be bypassed by unplugging and routing into the McIntosh therefore using it as the power amp only while still using the B&O receiver as the pre-amp/tuner etc....  

Sooo, question is,

1) is he correct about this? Can I simply unplug the pre-amp RCA's from the back of my B&O receiver and plug the appropriate leads from the Mc into the same in the receiver and will just plug & play delivering the power coming from the McIntosh?

2) If the jumpers are indeed RCA plugs and the Mc connections are just screws for bare wires, how do I bridge that issue?

3) are there any more details I need to be aware of so I don't damage either unit? My speakers are some 90's vintage rebuilt Norman Lab Mod 10's and I know aren't capable of surviving all the amp has to give, but I'll manage that gingerly.

Thank you for any and all input!