The whole thing sits on an epoxy filled tray. You can not get to the processor. It is very water tight but it is not serviceable. All you can do is reuse the J1772 cable.
I have converted 3 units to OpenEVSE including one for Pchilds. His unit used the discontinued DIY relay unit. There is room for a P&B relay and the surface mount unit along with the GFCI coil and the LED module.