I’m unsure of wether this leaking section is supposed to have a line attatched or if it’s just leaking cause it’s got a small crack it also looks like a spot where a screw would go

 

Video

 

That little feller is a mounting point for something your truck doesn't have. The problem you are seeing is the heater core is leaking, and needs replaced.

 

both my heater and evaporator core are brand new, I replaced them both together less than 3 months ago, it’s 100% condensation/water not coolant, I’m not sure if with those things considered it could still be heater core? It’s definitely dripping/ leaking from that mounting point though, there’s a small crack directly next to the mounting point also so I’m not sure if maybe it’s normal for there to be a lot of condensation/water there and it’s just leaking through the crack? Do you know if there’s supposed to be some sort of drain line that routes to under the car from the hvac box or anything like that? Both my heat and ac work great it’s just this dripping that’s an issue and getting that floorboard all wet, sounds like either way I’m gonna have to take the whole dash out again

 

If you are positive it ISN'T coolant, check the drain for the HVAC box.... I would like to think you cleaned out the box when you had it open, but, does the drain actually make it thru the bulkhead of the truck body?

 

where is it located on the box?

 

You won't find it inside. Should be fairly low on the firewall, in the engine compartment, near where the a/c evap core is on the inside of the truck.