This Power Distribution Board (PDB) is used for PM02, PM02D Power Module. Power modules with build-in power distribution such as the PM03, PM06, PM07 would not require this PDB.
There are two options, with or without XT30 pre-soldered. The option with XT30 pre-soldered goes perfectly with the ESC & Motor on the X500 V2.
It has 45x45mm mounting holes.