Memory / Peripherals for Sharp PC-1600?

[Tinue]

I got some parts, but I am still stuck. Even if I could solder the rather thick cables, I would still need to isolate them with a shrink tube. If this all works, I can plug in the cable, but I'll never be able to unplug it without it getting destroyed in the process.

So I also need some sort of 1.27mm prototype board, which seems to be impossible to get. It's not easy, unfortunately.

Quite some projects seem to have been done in the late 2010s, and unfortunately not one of them is still alive.

   
   

Edit: I ordered the adapter shown further up. Hopefully I can solder the pins to the adapter, and then use the adapter to plug/unplug the entire thing without breaking it. Also, I don't need shrink tubes this way. The adapter is only 12 pins, and not 15, but luckily the pins that one needs to connect are less than 12 pins apart.