Need relation between coas table and customer master data.

HI gurus,

I am developing a Internal order Report IN FI Module

using table COAS, I need to display the names of the numbers Assigned to Applicant(COAS-USER0) and Telephone Number(COAS-USER1). In these there are Only Applicant Number.I didn't find any of these table fields in customer master data (KNA1) table, Where can i find these fields related to Order number (AUFNR) in COAS table.

with regards,

C VidyaSagar Yadav.