If I recall correctly you remove the glove box, then the fuse board behind it can be pulled out (or down & out) and the relays are on the back. I had to swap mine over a few months ago and getting the board to drop down so I could get to the relays took a bit of effort, but easy enough once that was done.
With the glove box removed, if you lie in the footwell with your head at the bulkhead, you should be able to see the relays (just) - might give you a good idea of what needs to be done.