Thanks all.
Yes, concidered drilling, but was hoping there was maybe a way of preserving them as well.
But I'll just drill them out then.

I've seen only two holes used at the receiver end on some builds. And was mostly leaning that way. As others also has pointed out, it would also seem to end up near the edge of the GRP with the third new hole. But before deciding, I was also curious as to how this third hole worked with the recess/protruding part of the section with the handle?

Still haven't been able to upload the other two images I have prepared. At the dialog box when uploading, the wheel just spins without stop. Have never had that problem before.