EcoMCG :
unplanned bacon :
That looks like the adapter in my build. A PCIE 1X slot should work fine. Slotted in right beneath my GPU. Make sure you're not trying to shove it in a PCI slot
I'm not trying to shove it in. It just won't fit in, the back plate on the PCI won't go onto the back plate on the case to be screwed on.
Your pci-e x1 slot is black and it is either of the two short black slots under you primary video card slot (the top long black slot) or if you can fit it in, the short black slot above the video card.
A PCI slot, the two slots at the bottom of the mother board with completely different slot configuration and off-set from the other longer slot, are not where that card needs to go.
And you indicate that the mounting plate or I/O plate doesn't fit. Make certain the narrow tab at the bottom of the card''s metal back/mounting plate is fitted between the back of the mobo and the back ot the case; and of course make sure the cases own backingplate for that slot is removed.
UPDATE: 9:20p.m. PDT I just took a look at your case on Newegg. It looks like all the rear add-in card 'openings', except for the top one, are physically part of the case and that there is an external locking panel to secure any other add in cards.
Looking at the back of the case, unscrew and remove the 'vertical' metal plate to the right of the add-in card slots. It then appears that you have to bend or twist out the appropriate slot cover. Once removed it probably can be thrown out, it doesn't look like it is reusable. Mount your card and put the 'vertical' plate back on and you should be in business.
BTW, this might be explained in the case manual, or it might not; case manfactures often don't provide the best manuals.
Nice looking case.