Append structure

I have bsis table in 4.7 two structures are appended to this bsis table

I am copying one program from 4.7 to 4.6C. In 4.7 the souce program is using bsis table also using <b>appended structure</b>,

So as I am copying this program I need to append the strucure to bsis table in 4.6 also - right ?

If so do I need to append the second structure also whcih is not using buy my program . I need to do now it self.

Shall I delete the appended structure to standard table later - incase not needed?