Thanks...but a little confused by the reference to opening the PC with regards to use of Sata cable. Other than physically removing/replacing the drives there's no need to open anyway. It's not an extra drive installed as it's one in and one out, if I'm getting that right. There's only one space/dock/connection for the drive inside the laptop.
The Sata cable connects the SSD externally when migrating/cloning the HDD to it and with a clean install, the Sata cable is connecting the HDD externally once the PC has been opened/closed to insert the SSD.
Chocks away in half an hour.