The triple gauges are a little bit or work to put it, but they fit up fine if you take your time.
You need to get a sharp knife and cut out the padded dash section, 2cm within the dimensions of the gauges...so you've got some room to play with and trim down...if you post a good pic of that top section I'll mark out where you need to cut.
You then have to peel the foam and plastic off, the foam goes everywhere as it's crumbly When you're doing this you will discover the holes towards the back of the dash where the triple gauge lugs hook into, nice
You'll need an angle grinder to cut a void in the dash plastic, a nice rectangle just big enough to let the inner gauge suppot sit below the dash level.
When fine tuning the cut-out, gently pick foam away from under the plastic, and keep test fitting, making sure you don't go too far that you have any funny voids or visible cuts. Time is the key with this one.