I think you are being a smartarse.
A tower is a type of case. A common term.
A labtop will be a spelling error.
PaulB's answer would be best as you cannot input into a laptop's monitor.
Another way would be to have the hard drive in an external enclosure and connect it up to which computer you want and see if you can boot from it.
If it was a spelling error, he made it twice.
Yes a Tower, used to be a common term for a tall case, but a tower computer? cmon man