Default account when importing OFX/QFX

[rwshep2000.3129421 at bloglines.com]

Currently, when I import an OFX or QFX the account listed in the left-side
of the transaction matcher is "Unspecified."  I want this to be my checking
account in GnuCash; but I can't figure out how to change it from Unspecified.
 How do I change this? 

Thanks,

Bob S.