Those appear to be PC to me, just like what I have. And they are likely weak, as is characteristic, but that just means you need to use a hefty amount of it and boil like crazy. And still the experience will be on the light side, but that doesn't mean it isn't useful, even at low levels mescaline is useful for inner work.
The more water you can expose the cacti to, either through multiple batches or by having a large enough kettle, the more mescaline you can pull out. I think the best way to get the most alkaloids out is to use three 1 hour boils with a little added acid, like a lime, and freeze the cacti material in between boilings. At the end you combine the three batches and simmer until the tea is reduced to volume you can consume.
Given your heating source, however, I can understand why a single long boil is preferred, so as long as you start with very thinly sliced, frozen material, you could still do this in one session. Boil the cactus three separate times, saving the water each from each batch, then combine all three batches and reduce. This is how I do it, although sometimes I use a pressure cooker to shorten the boiling times, and sometimes I do four extractions, just to be sure.
I use the same technique (without freezing) with dried material from stronger plants and find I can get much more consistent doses at a plenty intense level. The tea tastes much worse though...
Good tripping to y'all.