1. Do I put one male and 2 females or the other way around?
You want 1 male in with 1 female at a time. a single male can breed many females but only 1 at a time.

2. Do I put them in the males tank, females or a separate container?
I like to move the male into the females enclosure. The females are building follicles/developing eggs and are better off without the stress involved.

3. What time of day/night do it do it?
Any time really. You will need to leave them together for a few days as they can lock for a long time and you want to wait until they are finished.

Hope that helps

Richard