Hi all,
I can't help feeling that this is a really basic question that must have been asked and answered many times on here but....

I have a BA booking for February which contains some flights on AA.
Using MMB I have chosen seats for the BA flights (recently became Silver) but not those on AA.
The mystery for me is how to find out the AA record locator so that I can choose seats using AA.com.

Any advice please?
Regards
Steve