Petitcheval, you have almost already answered your own question. Click back on Victor's link and when it comes up, click on 850 and 70 Series Removal Instructions.
Once there, click on Turbo Model and it will take you to an excellent set of pictures and instructions showing you where things are and a step by step removal. You can click on each individual picture and make it larger and print same so you have something meaningfull to reference when you are working in the engine compartment.
A word or caution, the job is not too bad if you take your time and make certain that you fit the E5 socket snugly on each bolt head (there are four).
It is easy to round the head of these soft bolts and then you will be looking at trying to remove the head with a dremel tool and almost guaranteed damage to the abs control unit case.
Please let me know if I can help further. Good Luck, Fred.