Hello, if you are still trying to restore your SMS FWT system, I've made progress on mine.
Here is my web page, scroll down to the floppy disk section and there is a picture of the jumpers you asked for:
keep in contact
Here is my web page, scroll down to the floppy disk section and there is a picture of the jumpers you asked for:
keep in contact
In the DOCs directory - some documentation.
Brief help - how to create an image of an RX50 floppy disk:
ImageUtilsX -rt11 -pack <directory> <image file> rx50