Connect Magic Trackpad 2 without cable? I have a brand new MacBook Pro and Magic Trackpad 2. When I turn the Trackpad on it's not 'seen' when I open Bluetooth preferences on my MacBook. 

I've read one solution is to connect the Trackpad to the laptop via the cable, but it came with a Lightning to USB cable, not USB-C, so I can't do this.

Should it be discoverable with Bluetooth? I've charged it for a few hours in case it was a battery issue, but it's still not working.
Make sure the power is on to your trackpad. You should have a BlueTooth icon on your menu bar.  Click on this icon and it should list all Bluetooth devices seen by your computer. Click on the Trackpad and then click on the connect button.