You have identified example of the "one size fits all" Van's wiring kits.
The AeroLED nav/strobes provide little to no RFI if installed correctly. The easiest way to do this is use of a three #20 conductor shielded wire from the nav/strobe to the power switch. I'd just run the wire and not use the clunky wing root molex connectors that come with the RV-14 kit.
The wire connectors are:
- Nav power
- Strobe power
- Strobe sync
- Common ground provided by the shield
I took the extra step to add a backing plate under the nav/strobe. The nav/strobe ground is made as short as possible and connects to it, along with the power cable shield, using one of the three mounting screws. This was a fix done on an older version of these nav/strobes - probably not needed now, but easy to do and I don't want to change when something works. The objective is to provide ground to the nav/strobe case when not mounted on aluminum - like an RV wingtip.
Photo is from 2011, before FlyLed landing lights installed.
Wired two RVs like this, all quiet in the headset.
Side note - use of filters to eliminate RFI problems is the last resort, not the first.