In your nuvi create in folder . System new folder JCV and add inside JCV for 2013,30 maps

If you add JCV in your nuvi this is path: .System/JCV/ jcv file

or for SD:

Garmin/JCV/ jcv file

Create simulation and you will see if jcv work.
On nuvi is no new menu when you enable future, you can see only on route or if you simulate route and clicl on LA arow in uper left corner and in new window you see junction view button,press buton for up and down and when you see white letters for junction view and press you will se JCV picture.