@osc Each strip has data in and data out. you connect data in of the first strip to the m5stack and then the data in of the next strip is connected to data out of the first.
@osc Port A is ok for RGB LEDS, all you need to do is provide additional pins to the black and red wires.
Black, white and yellow remain connected between the M5Stack snd the leds
I need to make a picture :(
@Thrasher not all LED strips come with power supplies, Most RGB/neopixel/WS2812/SK6812 come without power supplies.
@thbonk yes use Pahub(the 1 to 6 Expansion Unit) would be a best choice to connect more than one ENV unit to a M5 Stack device.
you can refer 6060 product document.
@osc all each strip needs is data and gnd from the M5Stack. My lead can be used on any USB adapter that can provide enough power. The power supply you linked to only needs the 5V and gnd connected to the strip but both the supply and the M5Stack must have the gnd connected together.
In addition if you have a pattered you want duplicated on a second strip you can connect strips together in parallel