This question is about the PCB part of a double LED strip 'controller' circuit.
See the circuit at: Questions about LED strip circuit and current.
The arrow shows now the 5V GND pin (JST XH) pin in blue encircled and I tried to put the expected GND flow with blue arrows.
I hope this will be sufficient. Each pin marked in purple has 0.83 A (max) GND from the LED strip.
Are my current flows ok? (except for the one pin JST XH connector that cannot handle the resulting 8 * 0.83 A = 6.64 A.
Below are both sides of the relevant PCB part with the GND planes shown in green (bottom layer) and red (upper layer).
(in the version below the MOSFETs are wrongly connected, but for the question it does not matter).
Calculation for the track widths for the MOSFETs returning path which are 0.5 mm in my PCB: