Where to place Custom Blocks?

[newscin]

Hi everyone,
(especially @roar @l-andorrà @fxDreema @QuantEngineer )

I've created 4 custom blocks by means of https://fxdreema.com/studio/MQL5
They are copy-paste things given by the seller of Walk Forward Optimizer library.
**But I am not sure where to add them. Can you help me out please:
They are:

1. First one is one line '#include' code calling a library that is already added to mt5, and to be place in the very beginning of the code. but where to be deployed in fxdreema?
2. Second one has to be place into ' int OnInit() ' , (into Oninit I think ? )
3. Third is starting with void OnTesterInit()
4. Fourth has to be placed under ' void Ontick() ' ( can I place it anywhere after a 'pass' block ? )
   You will see the screenshots of code blocks attached as 1,2,3,4 to the above order.

[newscin]

anyone??

[l'andorrà]

I'm afraid I'm not a programmer, my friend, so I cannot help you. Maybe you should contact the admin directly.

[newscin]

thank you very much for your time.