Hold on!
The cable/cradle thing is for installing into desktop PCs, which tend to have slots for 3.5″ drives, and need a cable to connect.
No or cradles needed for laptop, as it slots straight in to the MB and will be the be the same size as what’s in there.
You do need an external caddy (or just an adapter, without the enclosure), which should come with a cable. You can always format the old SSD, and put it in the caddy afterwards to use as another external drive.
For the cloning, you install the software, put the new SSD in the caddy, connect to the laptop by the cable, press “go” on the migration software, wait for it to complete, swap the drives over in the laptop, job’s a good’un. Turn on and go.