1970 Duster regulator and resistor

here is a picture of my car fire wall. I put two 1/4-20 phillips screws in for were I guess the regulator goes and 1/4-20 hex bolt were I guess the resistor goes, but if that is were the resistor goes, what about the hump on fire wall being in the way. I take it that there are only two screws that hold the regulator on? (it has 3 holes)

View attachment 1715142618
Correct, only uses two of the holes.


Alan