Welcome to TRS
Can't see squat
But if its a 4.0l OHV(1990-2000) then yes, the lower intake can leak at any of its 4 corners
The head is cast iron, the intake is aluminum
When you have two different metal types with a fluid flowing between them it can cause corrosion of the weaker metal, aluminum in this case and ALSO the gasket between them
If you change coolant on time that won't happen, green coolant needs to be changed every 2 years
Usually is the front passenger side or rear drivers side corners
Coolant passages are only at the corners, nothing on the edges