Xarb

I need to make the robot use an item in a specific part of a block in front more specifically in the upper right or left and with the default values of the sides library I can not do this. I would like to know if there's any way to use different values and if so, how can i do do this or if it is possible to modify the sides library in some way. Sorry for the typos I'm not fluent with the English language Thank you