[ddmckee54]

Klump:

I don't about the MFC J9 port, but I've been down the JST rabbit hole myself a couple of times - mostly looking for plugs for CNC projects and 3D printer cable modifications. Have you got some pictures of the plugs/sockets that you're trying to mate up to? Dimensions are also a big help, especially the pin center-to-center spacing - as there are different pitches for the pins. The most common spacing is 0.1", this could also be listed as 2.54mm. (Depends on if you're Metrically or Imperially challenged.)

If you're going to get the crimpers for these connectors, and I recommend that you do, DO NOT get any that claim to be suitable for both JST/Dupont connectors. I've got two different sets of crimpers that will cut the ends off of JST terminals every time, but work just fine on Dupont terminals. When you compare the crimping dies you can see that the Dupont terminal and the JST terminal are two completely different animals.

Don