Hi Peter,
If it's of any value, the HPE top fixing is a metal tab on the card that goes into a vertical slot in the bodywork.
It has to be slotted from above and 'slides' down to locate. It's a bitch to get it to fit correctly,hence I
found both of mine flapping around, not tabbed in.
But of course,the Spider may be different.
Cheers, Nige