regular mini pcie wifi card dont fit in the slot

Hy guys,

I don't know if any of you aready had this problem but i'm trying to install mac os on my 751h and i remembered that i had a RTL8187L and to i took it to swap for the ar5007EG because the driver is much more easy to install.
But when i opened the wifi cover slot i saw that the 5007EG card is "half size" and the support / scrool stay in the midle of the mini pcie area. So when i tryed to install the RTL8187 i couldn't fit because the scroll holder force the new card UP, making the "closing" slot imposssible.
I've tryed to remove that part but even with much force, i couldn't.

so, what should i do to remove it?

thanks!

 

You may try to use right size card instead of using force...

 

is there any dell1390 in this small size?
if does, i would try for sure!