Yes it can be the same, a normal knit cast on. The edge isnt going to be seen so it’s not vital.
Excellent question because, you’re right, it will look a bit different to a knit cast on, on the right side.
If you prefer, you can use a purl cast on.
See this video, it’s in chapters and the purl cast on which matches the knit cast on is at 6 min 27
The main thing for this is to use a matching cast on for this piece and again when you do the right front. So here knit or purl cast on, and the right front also knit cast on, don’t switch to e loop cast on for instance