The tripler pinout is pretty much the same as the doubler. There's just one extra footprint. So look there for pinout info.
I'm missing some of the copper traces on the back.
If your tripler looks like the one below, then it's OK. The copper traces are still there, and if you look close you should be able to see them. The solder mask in these areas just didn't get removed for some reason. This is just a cosmetic issue and does not affect functionality.