sheared caliper bracket bolts - rusty VW 2010 Passat

[cnprior]

hello,

whilst trying to maintain my Passat Shed.......

I have sheared two caliper retaining bracket bolts.......despite using plusgas, heat and trying to tighten the bolt first !
my plan is to drill the remnants of the bolts out carefully using an electric drill.

does anyone know if the bolt holes in the hub on a 2010 Passat are straight through holes, or whether they are tapped?

any advice appreciated as this looks like it is going to be a nightmare......see attached image.

thanks for any advice.

chris