Accounting for Nominal amounts posting for 62B

Hi,

Need to post the nominal amounts for a Cross Currency Swap where we buy EUR and sell GBP. Struggling with assigning the relevant GLs to the AAR.

Have GLs for the GBP(GL1) and the EUR(GL2) house banks, so when posting the flow, the GLs dont allow posting in other currency as set for GBP and EUR specifically. How would the accounting hit when the nominal amounts are exchanged and posted. Please suggest.

Thanks

Deepankar