I actually copied the wiring instructions from some guy on Facebook (shout out to you if you're reading this) but I thought you guys might also like this mod.

There is a 3D print somewhere to hold the crossfire unit but I just secured mine with a couple of ummagrip pads and some hot glue...

Separate the Crossfire unit from the JR module adapter (note: will stop you from using WIFI and thus TBS cloud), open up the main unit and solder wires to the points below (i didn't have another better coloured wire unfortunately):



Take apart the pin header from your JR module bracket which came with the Nirvana and solder the crossfire wires like this:



I just ran them through the biggest socket on the bottom and hotglued it up to stop any tension on the wires.

Plug it in, and glue it up



Sits pretty flush





Just note that if you charge your batteries with the USB port on your radio this might not be a good choice, since now your crossfire module will -always- be on when the radio has power. I only ever fly with crossfire though so it works great for me and significantly reduces bulk.

Good looking mod.