I have found a temporary solution. When I looked at an
AUI cable I had, I
realised I could unscrew the studs. This allowed me to plug the cable in and
connect the transceiver to the other end. However I would like to find a
more permanent solution. I like the idea of finding a locking clip best, I
will have a go at finding one and also take a look inside the machine to see
if it is feasible.
If you unscrewed the screwposts and nothing (like nuts and washers) fell
off inside the machine, it means that said screwposts screwed into tapped
bushes in something, probably a PCB-mounded DA15 connector.
The slidelock assembly wil lfit the same holes, the spacing is
essentially standardised. The screw thread is almost certainly 4-40 UNC,
which agains is standard for this sort of thing.
-tony