The screw terminal area on USB-625x devices does not include a breadboarding area. If you need an easy solution for building external front-end circuitry I would indeed recommend the USB-6251 mass termination version with an SCB-68 terminal block (or similar) and a shielded 68-pin cable.
Hopefully this helps-
if I understand correctly: the "screw term" version has screw contacts onboard: I can connect a thin wire directly to the DAQ lines. On the other hand, the "mass term" version needs a supplementary cablesold by NI.
Is that correct?
Many thanks to all, regards