I thought I'd share my results of using this process on my WECO card dialer. The phone had a factory refurb in '83 and was probably modularized at that point. When I got the phone someone had removed the modular jacks and cords and put spade tipped cords on it, but left the big square holes. I took the liberty of putting the modular jacks back on it and using a new modular handset cord, since I didn't have to cut anything and the holes were already there anyway.

Before:

[Linked Image from i34.photobucket.com]

After:

[Linked Image from i34.photobucket.com]