Jack input boards really clean things up. You can use a ribbon cable that plugs in and avoid soldering all of those wires to the jacks. Have a look at mine with the jacks. (mine doesn't show the ribbon cable, but it's just a IDE cable like for computer dvd rom players.) You solder the jacks to the board just like any through hole component.
Working unit resized.jpg
and here is Gastric's with the loose jacks.
Really just cleans things up a bit.
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