Attaching MU cables to an Athearn BB Kit Shell

[Santa Fe buff]

Hey guys,
I'm trying to settle on something. I have some Details West MU cables, and I don't know if I should either remove the default Athearn template and drill a hole, or just remove part of the template and drill a hole to attach the MU cables. Anyone here use or didn't use the template?

So, what's the advice? 

Cheers,
Joshua