I just use an electronics screw driver (a really, really small one) to carefully pry the top of the connector off and expose the pins.
I then count the small cables on the TDM ribbon cabe and use an old 80pin PATA cable in stead of the original TDM cable. They have the same cable spacing as the TDM connector pins.
I remove the excess cables that's not needed from the PATA cable.
I can't remember from the top of my head how many pins the TDM cable has. IIRC is around 50.
I then made a small cradle to keep the cable centre over the connector, so the crimping (correct word?) would be spot on. I then pressed it together with a carpenters vice.
Repeat 10 times or so, and then you have your TDM cable