assuming your talking about one to fit across the strut tops, you will need to remove the four 13mm nuts and washers from the struts, the coolant bottle nuts ( a couple of 10mm plastic ones) and the washer bottle screw, you wont need to remove the bottles just loosen them off so they can be moved about.
Depending the on the spec of your motor and the strut brace you have, you may need to drill an extra hole in the end near the coolant bottle, you'l see what i mean when you get there.