Connect ARGB header to Sapphire Nitro+ AMD 5700xt

[EHBEHB]

The ARGB header on the MOBO is 3 pins (or rather, 4 including 1 blank). The exact same design as the RGB input on the Sapphire Nitro+ 5700xt. I’m still waiting for a pinout from Sapphire, but I’m wondering if anyone has had any success connecting it? The only fact I have so far is that it is also 5V & that reviews have said it is “addressable”. I don’t have a cable to test.*

[EHBEHB]

looks like no one knows and I will have to experiment.*

From memory the motherboard is (I will check manual)

1) +5V
2) Digital
3) blank
4) ground

The Sapphire Nitro+ 5700x pinout I don’t know. What would people guess first for:
1) ?
2) ?
3) Blank
4) ?

The easiest would be if they are identical. Can I really be that lucky though…