Where to place the ORION DC-DC?

Hello pwfarnell. It all worked out and the install went great! Thanks for your help!
After it was all hooked up, all of the components were functioning fine until I connected the Cerbo GX to the NMEA 2000 backbone. I sent an outline of the problem to the DIY community but so far no replies. Link attached.

Of bigger concern is that my Fusion stereo connection to my MFD completely stopped when I connected the Cerbo to the NMEA 2000 network. If I disconnect it, all of the functions return to normal. I removed the fuse from the Victron cable thinking that might help. It didnt. Also no data is showing on my Triton 2 displays either. I should add that on my Victron Touch 50 the Fusion radio and the Tritons show on the VE.can device list as well as the MFD.

I am wondering if all of these problems are related and if there is a solution. Thanks for your help.

https://community.victronenergy.com/t/starter-battery-not-showing-on-mfd/37540