Import into custom profile fields?

Hi all,

I am attempting to convert/merge from IPB3.x to MyBB. There are some fields, like location, from IPB that do not come over. But there is a Location custom field in MyBB. I am wondering if there's a way to get that data from IPB into custom profile fields in MyBB during the merge process. 

I briefly looked at the user.php code for IPB3, but nothing popped out at me. I've also looked through the docs and searched the forum, but didn't find anything.

Any ideas?