The 'step' - the alloy bracket with the footpegs on it - has some extra fittings added just for that side panel infill. The actual fitting on the 2008 models and later - the grey piece - is atatched to the bike coloured side panel, and is never separated from it. Take off the side panel, the grey bit comes with it - on the left hand side. There are two plastic plugs - with a waist - which push into rubber grommets which are an integral part of the alloy step to secure the lower end.
Here are some more details of my 2006 left hand side installation.
1. Working out where to put the supporting bracket and holes. Note the location of the panel rear hole and the fuse box holder - outlined in red..
2. The Outside view of the home made bracket. Four holes drilled - but you can only see three here. The left hand hole fits around the front side Panel screw hole on the frame. Its a large hole and here is covered in thick tape with cuts in it to provide a bit of cushioning. The end and the inside is also taped for the same reason. The other two holes have well nuts pushed inside - 5mm or 6mm - I cannot remember.
3. The same bracket viewd from the inside - revealing the 4th hole and the right angle bend at the rear of the bracket. This will rest up against the fuse box holder .
4. A detail of the bracket fitted at the rear. The red rectangle hilghlights the captive nut slipped over the top of the fuse box holder.
4a - Captive nut. This was slipped over first so that the position of the required hole could be marked on the sids of the fuse box holder. Once this was in place, the position of the hole in the right angle bend of the bracket could be determined. The photo also shows the panel bolted onto the bracket. It might be a bit annoying having three extra bolts to remove, but I don't remember ever needing to take it off ! Imust have done, but its no big deal.
5. The bracket fixed with a hex head screw. The black thing in the bootm left corner is the top of the pre-load adjuster, and the folded up pillion footpeg is on the right of the picture. So this is looking down onto the top edge of the bracket. The bolt . screw is secured against the fuse box holder.
The black strip on the top edge of the 'step' bracket (out of focus) is a strip of narrow velcro like material.
You can see the back end of the well not sticking through the bracket - just below the bolt head.