OT--FS300 Footswitch--How Do I return it to its previous Wiring

["Gary Lehmann" <relayonemanband@cts.com>]

Subject line says it all, but here goes--
After trying the use of the FS300 as a foot controller for the Echoplex
Digital Pro, I have decided for various reasons to return to the use of the
EDP foot controller which I purchased with the EDP.  That being said, how 
do
I rewire the Digitech FS300 so that it once again functions as a TRS three
button footswitch?
Gary