Adding New Fields in FAGLL03, which structure to Append New Fields, FAGLPOSX or FAGLPOSE

[former_member54525]

I have requirement to add new fields Atl.Reference (XBLNR_ALT) & Ref.key(head)

(XREF1_HD) to FAGLL03, without changing the standard tcode

I checked existing Answers to my Requirement, and I came across a Note 984305

Suggested to Implement the Note 984305, But Its having Status as "Implementation Not Possible".

Pls suggest me which Structure to add fields, and then Need to run FM "ITEM_STRUC_EXTENSION" that will generate Fields in Standard Layout of FAGLL03

Suggest me at the earliest