E90 Head bolt location question

[mountain14er]

While replacing the oil filter housing gasket on my 2007 328xi I checked the "external" head bolt right in the same area. It's shown in by the green arrow on Figure 1 here: BMW E90 Cylinder Head Bolt Testing | E91, E92, E93 | Pelican Parts DIY Maintenance Article by some miracle, the bolt was loose but not broken. I purchased the parts to replace the bolt but noticed the bolt pack has 4 bolts. These are different than the full 14 bolts holding on the head. I haven't been able to find where the other 3 bolts in the 4 bolt pack are located. does anyone have a diagram to where they are? I want to check them while working on the loose one. Any other suggestions of what to check while I'm in there? Thanks.