This are two small adaptor pieces to put on the Ramps 1.4 board on your Orca printer.

Print both pieces with support.
The parts are very tiny, use a small print setting, and ensure that the support is not too strong or it is very difficult to remove afterwards.

Mount both plates with short M3 screws on your printer ans just plug the Ramps 1.4 Kit into the Adapter.

The board itself is not fixed by screws, it holds just by pushing it into the frame.

the board holds very good, it can not fall of by mistake !