69 Dart heater hose bracket location

My 69 Dart was originally a slant 6 and now has a big block. So, it didn't originally have the inner fender mounted bracket that supports the heater hoses. I picked one up but I am not sure where to drill the hole to mount it on the inner fender. My inner fender has these 3 dimples in it. Does the hole for the bracket screw need to be drilled in one of these dimples? If so, which one? If not, where should I drill the hole?

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