Allocating Wound Question

I keep reading allocating wounds section over and over. It has been explained to me that for example if there are 2 units fighting with 10 in each one in base contact with each other and for example model 1 has a 2+ save and model 2-10 have a 3+ save that model 1 can take every wound from the wound pool even from model 10 to model 10. Now from the book it reads "A wound must be allocated to an enemy model in base contact with a model attacking at that Initiative step." What I don't get is how do we do different from the rule book and allocate a wound to a model not in base contact? My other thought is for example there is a model with I7 and 9 models with I6. I7 is in base contact with a "chump" and a I6 is in contact with the beast save enemy. It reads "A wound must be allocated to an enemy model in base contact with a model attacking at that Initiative step." How can a model in base contact with a I6 model take a wound from a model in base contact with the I7 model? I am just trying to wrap my head around it is all. Thanks for the input in advance.

the i7 model hits first, and the wound can be allocated to any enemy model in base contact with i7. i6's turn, all wounds caused by i6 can be allocated to enemy models in base contact with i6.

Read the part about who is said to be in base contact.

I guess what I was taught is even if guy with 2+ amazing save isn't in base contact with I7 guy, He can take the wound from someone who is.

yep, thats correct, if the mod isnt in b2b contact, it cant tank it. And thats why you should chalange out the 2up guy for him to not be in b2b and tank any shots ^^