Adding two custom fields in sales order creation form in web UI

Hello Experts,

I have a  requirement to add two custom fields "Reference" and "Reference Desc" in sales order creation page.This fields are already available in "Daily Activity" creation view in the Reference optional section.This two fields are under "BTDOCFLOW" context node .

I tried to do this throgh AET,but this context node(btdocflow) is not available under sales order view.

can any body suggest me here, is this possible to create the context through AET? (or) Should I add it through BSP_WD_CMPWB?

Here one more hassle is the exact two fields attributes are not available in the dependent object  BTDOCFLOW of sales order,but these attributes are under daily activity context node BTDOCFLOW.

Thanks in Advance..

Regards,

Kiran