actually that triangle does matter. it's a reference point. if you re-tighten the bolt to that location, without overtightening it and possibly flattening out the wood of the forearm, you will have a consistent torque on the screw which may help with holding your zero if you take the rifle apart removing the forearm.......
i mark the forearm with a notch using a knife to index the screw on my .223's. they are consistently accurate and return to zero when re-assembled with ammo' that they like.
take care,
ss'