Here is how to do it.
First connect your phone to the wifi of your graph. It's fairly simple if you have ever connected your phone to something like the GoPro app it is very similar.

Then in the app click the menu and you will see "device connected" with your graph name. Click that and then "start sync" it goes pretty quickly.

Then you will see this.
Here it is on the app and then graph.


One thing to note is that your card must have an active subscription and the unit must be wifi capable (Lowrance HDS Carbon, HDS Gen3, Elite Ti) and your software must be updated as well.