‘71 Scamp, radio n speaker/s

Thanks fellows. Great pic under dash. I found SS #10 carriage bolts that work perfectly. Put bolts in with nuts and tightened the nuts up tight. Took a piece of cardboard of an approximate size, stuck it up against the 2 bolts to get center distance. That's all I needed to confirm. Now in the process of fabricating the speaker mount plate from a piece of aluminum sheet to fit the two 4" speakers that I purchased. Once I get speakers in, on to new defrost tunes.
Del S