I'm guessing this is connected with your other post about the Thinkpad,
http://daemonforums.org/showthread.php?t=10506
If so, you'd be better off closing this thread, as otherwise, you'll be getting answers in two separate places and various people may wind up doing double work.
For completeness, I'll mention that a solution was given on the other thread,
https://www.reddit.com/r/openbsd/com...fi_at_install/ though it was for an older version and shouldn't be blindly followed. But generally, even on a relatively quiet forum like this, it's considered a Bad Thing(TM) to post the same question in two different threads.