Fitting sparco subframes

Just ordered and received my sparco subframes i chose these as they are advertised to fit originally sliders and when ordering it seemed they are driver and passenger side specific but once received it doesnt seem that either side are any different (unless i have been Sent two of the same side) and i cant seem to work out how they fit to original sliders as none of the holes seem to match up to the bolts unless im being completely stupid. Any body fitted these and any advice

I thought i did but i have just fitted them both anyway it is possible it just means that the mounting holes are a couple of inches further back but i have sliders fitted and i dont sit in the passenger seat so dont really care that it may sit a tad further back than the drivers side.