See the eBay link below. Look at the rear of the speedometer. You'll see the little (rusty) metal clips on the OD of the black plastic lamp holders.
I don't know of anyone who sells the clips. You will have to improvise, buy a used speedometer to get the parts, or search thoroughly for the ones that used to be on your car.
: When I removed the speedo on my 65
: Spitfire “4” I had to detach the three
: little warning lights at the bottom of
: the dial.
: The black plastic light housings at the
: rear of the speedo “popped out” with a
: little effort. But now that I'm
: replacing the unit, they will NOT “pop”
: back in. They go in, but then flop
: right out again. I desperately need to
: find out how to get them to mount
: securely back into the three round
: openings in the back of the speedo
: housing where they originally were.
: At the moment I'm actually considering
: Gorilla glue or duct tape. Gotta be a
: better way!!!