I thought they were supposed to be MG 151/20’s, 20 mm cannons?
I think the intention was that it just had the single central line 20 mm and they screwed up the art.
This has been brought up in the past a few times, I myself, brought it up several months ago, and the response I got was that they were aware of it, but apparently nothing has come of it.
Well on warthunder the BF109 F-4 tropical can upgrade to bombs or 15mm gondola cannons. I was simply going off that because that’s where they just copy paste everything.
As far as I know the 15 mm MG 151, was only used in the center line, briefly, I don’t think any of the gondolas were 15 mm, but it’s been some time since I researched that