Door mirror mounting for 67 Tempest conv.
Removed an aftermarket "one size fits most" from the driver's door of my 67 Tempest convertible. That mirror's mounting bracket screws were put through "aftermarket" holes into drywall anchors. You read that right, the metal expansion type drywall anchors. What appear to be the two original holes still exist, about 3/8" dia., and I have an OPGI mirror and bracket ready to mount, but the OPGI mirror came with sheet-metal type screws. What do the original anchors that went into the original holes look like?
Thanks in advance for your help!