SMG has the same style kit, look at where they located the spot to drill and tap.
https://secureservercdn.net/166.62.1...87m_125633.pdf
I have been working with DSX the last two weeks and i will 100% be purchasing their aux kit, lt4 injectors and pump come spring. Great customer service and i didnt even buy anything yet.
Looks like spot #1.
My DSX system shipped and ordered mine to turn on at 4 psi. Granted the time it takes to go from 4-9 psi at wot is a second but I didnt want to wait for 9psi to have the fuel.