Hi Hari,
At BW side, you can click on transformations between DS: 2LIS_45_ITM. to target, from that screen you can observe left side fields which are part of your data source at production and compare with quality.
or at ecc side RSA6 double click on your data source(2LIS_45_ITM) and see which fields ( hided fields won't be part of your bw data source) are there at prod and compare with Quality.
Thanks