[Stick486]

Welcome N/A..
drill the table to accept your router...

 

[Stick486]

bore a smaller hole than required...
punch a dimple into the SM for the screws using a blunt pointed center punch like so...
be sure to solidly support the top w/ wood when you dimple the SM...
regrind the punch to match the screw head if need be...

.

 

[Stick486]

Thanks for the reply. Updated my profile by the way lol.

The top kinda looks like it is cast as it has ridges in it. So probably aluminum.

I was thinking of using the router as the template from underneath and drill the holes from underneath then countersink the holes from the top.

howdy Adam...
use the router's base plate as a template and mark hole locations/placement w/ a transfer punch..
if you have one hole that lines up yur golden...
other wise double stick the plate into your desired position...

NOTE:
as a plus, you'll be leaving the plate off of the base when you install the router...

 

[Stick486]

hole saw that fits the table's hole...
hole saw that fits the base plate....
put the two together on your arbor as line up guides... (one inside of the other)...

if you have an oops arbor, yur golden...

 

[Stick486]

if you want a fuzz thicker top to work w/..
epoxy thickened washers to the underside of the table's top at the new hole locations..

 

[Stick486]

Excellent!!!