Just to inform that Invertebrate Dude has helped tremendously to get an ID on these roaches. Thank you!
Based on the location, male to female size similarities, female ventral abdomen with short yellow hairs, also matching the description from the Perisphaerinae Revision Paper, he pointed out that he thought it is Perisphaerus punctatus.
Now onto to get these established in the hobby. My colony is doing very well, and now I need to think about scaling up the enclosure.
I like this setup a lot, its very practical and functions very well but it wont withstand 40/50 adults. I want to order the same exact design, but 3 or 4 times the size.
Just last piece of information. Since these roaches are local, I have noticed that, comparatively to other species, the low temperature drop to 12C had little effect on their activity levels. At night, they were the most active roaches.