Fit a 1K5 or 1K2 (2W) resistor across the brake light on the bulb carriers (both sides). It can be done on the loom, but this is neater, despite being hard to solder.
These resistors date back to the 1980s, something I had lying around! The capacitors were added for noise suppression as some LED brake lights disrupt FM radio (if channel is weak).
You shouldn't need the capacitors, but be warned, interference can occur.
You will need plumbers flux to break the galvanised / zinc coating on the rigid conductors.
Looks a mess I know, wasn't going for pretty.
You may need to jiggle the carrier about to get it clipped into place with the taller LED lamps.
This stops the 3rd brake light 'major' fault indication where the outer sections of the upper brake light illuminate.
My brakes lights are now a really nice deep bright red, very impressive with the right LED lamps.