I have just purchased a Latitude E7440 with a small mSata SSD and empty standard Hard Disk bay. I need to add a hard disk or extra SSD, but there is no Sata interposer to connect to or  any caddy to insert the hard disk. I have been unable to get any sense out of Dell, or even part numbers. I would have thought that the interposer, at least, would be common with other models. Can anyone help?