Cost center value to be picked in Retirement entry

Hi

We have retired one asset with '0' sale value and accounted the same.

we observed that the depreciation line contained the Cost center value and but not in the "Loss of sale of Asset" line. We expect the cost center to be picked because the "Loss of sale of Asset" is a P&L account

Also we would like to know from where CC is picked for the retirement entry. Is it from category or book controls or assignment window

thank you

Venkat