This is my first post, simple, but can help someone.
Any correction or tip is welcome.
I leave here a small and simple tutorial on how to put fixed values in a search help through the Search Help Exit, like the image below:

- Create a function group.
Ex.: ZGF_SHLP
- Create a function module for Search Help Exit.
Ex.: ZSHLP_EXIT
- In modification of parameters of the function, set the following:

- In table parameters:

- In the source text of the function:
In the example, for COD_TAB field will by default the values of 5.1.1 . and 5.3.

Uncomment the line (CallControl - step = ' SELECT' .), does not appear the selection window, already opens the prompt selection with the filters defined in the code.
- In SE11 within the search help , put the function created in Search help exit field.

And that's it. I hope it help.