You need a PCB. You may use the layout from Github and etch it yourself or order the PCB or a complete kit.
The envsensor using the SMD version powered with a CR2032 battery is designed to power only sensors with small power consumption or when the measuring cycle is big. For example, a CR2032 is good if you use the devise as window sensor. If your sensors need more power, you should use a bigger 3V battery or 2 AA(A) alcaline cells.
maybe extra pins, at your opinion.
Please read about it in the description of the Generic Midi (THT technology) description.