The amstrad uses a different ribbon cable but you make up (or buy) an adapter to connect the amstrad 26 pin cable to the 34 pin gotek
The amstrad power connector looks the same but the pins are swapped about and MUST be changed or you will damage the gotek.
A single Gotek works well with a 9512, slightly more complicated with a Gotek and a floppy under the later version of CP/M due to the way it determines if the drives are 3" or 3.5"
First thing I would do is get a Gotek off Amazon (This should do it
https://www.amazon.co.uk/gp/product/...GE8&pf_rd_p=6e 878984-68d5-4fd2-b7b3-7bc79d9c8b60&pd_rd_r=5923e8f9-16bf-4ae9-ab15-6340afa66d6d&pd_rd_w=ewH4b&pd_rd_wg=WqxXS&ref_=pd_ gw_unk)
Then download and put flashfloppy on to it (plenty of guides on how to do this, but we can help)
Mounting a gotek in the Amstrad case is a bit difficult but there is a 3d printed mounting bracket on ebay, or you can hack your own. Remove the monitor frame by undoing the four black screws at the bottom of the metal plate and swivel the screen forwards and it all comes off as a unit (couple of cables to disconnect)
To make up the floppy drive ribbon cable adapter this website has pictures and the bits you need
https://www.cpcwiki.eu/index.php/DIY:Floppy_Drives
The power connector is a simple matter of swapping the outer two wires with each other leaving the two black wires in the middle two pins untouched. With a knife, the latches can be lifted and the wire pulled to remove the plug from the connector block, swap them round and push back in. Make sure they have latched back in place and wont push out when plugging into the Gotek.
Then its software time. NGTWolf gave me a ZIP file with a lot of software on it which I can let you have with his permission. Again there are a few wrinkles as most is for the 8526 and formatted as 40 track single sided and the 9512 wants 80 track double sided.
I will get my machine back out and finish up a few jobs and re-acquaint myself with it.