ThomasBelgium:

You can do what I did...I connected/mounted to my rack a old serial/RS-232 switching device so that I have two "in cables" (i.e. one fopr upgrades and one for RS-232 to my RTI_ and one "out cable" to the 861 pre/pro.

I have, as has been suggested, also left the two cables permanently, but neatly, in my rack so that upgrades are a snap...

Hope that helps.

Audio: Triad Monitor Golds, Surround Golds, Silver Subwoofers; Procella P-18 Subwoofer; QSC DCA 16622s, 1644, 3422, BASIS 922uz; ADA MACH IV B
Other: APC S-15s; Crestron
Sources and Video: Ran out of characters .....................