Theory 1.
On the top side of the subframe pieces, I think there might be holes that you can lower the bolts through or stick a socket into. You can't see them from the bottom because they are covered by rubber grommet things. This is just a theory. When I took my 626 apart I saw round rubber grommets filling some holes on the top sides of the subframe pieces, maybe that's what they were for.
Theory 2.
It seems suspicious that there are large holes right next to the little ones the bolts would go through. Those large holes must have something to do with installing the brace.
I wonder if you could find some sort of bent wrench to stick into the large hole. This hypothetical bent wrench would hold a nut still while you tightened the bolt that was inserted from below. You would have to tape or glue the nut to the wrench so it could be inserted in there properly, and not come loose to rattle around in your subframe member forever and ever (or until it fell back out).
Theory 3.
Maybe on the 4WS they welded a nut above the little hole before the top and bottom halves of the subframe piece were welded together? This sucks I really wanted this to work.
Keep thinking about it.
[Edited by antiSUV on 04-05-2001 at 08:41 PM]