If you are talking about the "Wedge mounts" they fit a hole 7/8" - 1" diameter only (sail mast), not the larger hole of the molded rod holders on the Outback.
You can purchase the Hobie Rod Holder Extensions and cut them down, weld/glue some plastic or something else to it to be flush with the deck, then bolt on a ram ball/ram rod mount. This way they are removable and you still have the flexibility to turn your rod to whichever direction you wish.
Here are a few links showing the items:
Ram Wedge mounts
1-½" Ball
http://www.ram-mount.com/CatalogResu...5/Default.aspx
(Don't use this if you plan on using the molded rod holder positions).
Look here for what Ram has in their catalog
http://www.ram-mount.com/Home/tabid/37/Default.aspx Lots of good stuff.
Hobie Rod Holder Extensions
http://www.austinkayak.com/products/...Extension.html You can get these at OEX and Fastlane also.