This junction box requires four M3x6mm bolts to seal.  There is an optional TPU gasket to help ensure a smooth seal of the lid.

There are two holes in each end which are designed for ⌀16mm tubes which can protect the cable.  A further hold is in the top which allows a third cable to be connected, this will need sealing with silicone to ensure a tight waterproof fit.

Enjoy ;-)