Havis uses continuous slots for the screws that retain the equipment brackets, not regularly spaced holes. The console itself does not appear to be Havis.
However, the bends in the equipment bracket makes me think it is a Havis part. The additional holes that were drilled in the console to accommodate the equipment bracket seem to lend credence to my presumption that the equipment bracket is not of the same manufacture as the console.
If the M/A-Com equipment bracket turns out to be a Havis part, it will be marked on the inside face of one of the mounting surfaces with a portion of its part number:
If this turns out to be a Havis equipment bracket, then a suitable Havis equipment bracket for the new radio can be selected and could probably use the same, additional holes. Havis has a list of Motorola equipment brackets, here:
https://www.havis.com/catalog/Motorola-753-1.html