MyQul
Chairman of the Bored
Does the kit not just come with a Mangrove Jacks yeast? The only MJ yeast I ever used stated the temperature range, attenuation and floculation on the sachet. I wouldn't have thought it would have a significant cost benefit to stick unprinted sachets into these kits.
Edit - just spotted your photo of the box contents and it does appear that the yeast sachet is in plain packaging! Just stick to 18-20C as that seems to be "standard" for most yeasts.
Seeing as the kit is for a Califorian Common. I guess they would put the MJ Californian Lager yeast in the kit?