Would like SLA to make retirements to the cost center of the asset

Hello,

Out of the box the cost center used for retirements on the PnL side is from the default account string off the book definition.  

I would like to make it use the cost center of the asset to record retirement Gain/Loss.

When i assigned the cost center to pull this as i would for depreciation, it just ignores it and still bring the book definition default accounts cost center....

I've been reading a lot of white papers on it, but none that are exactly doing this.  

Anyone out there have experience doing this?

Thanks!