I am following the plans of [buderimlad] and making a set of drawers for our 2005 ST Wagons,my question , is there a template available or how do members secure their drawers in their cars.
Ian & Estelle, not a GU but may give you some idea. (GQ)
The first pic was me answering somebody's queries. He showed in the pic the possible attachment points, and I just circled the bolt holes i used (green circles). Basically a half dozen points, fairly evenly spaced. Longer bolts and spacers used where applicable.
Also mortised out on the bottom of base plate where there are some high points on the wagon floor, (where OP has a shaded circle on upper right, is the major one).
Second pic shows the timber and 20x20mm angle, and some thirty odd 1/4" bolts, I used for the side pockets. It seems overkill but I carry a second spare on top of the draws, so had to be fairly substantial.