Dell Inspiron XPS - Manual (Page 44)

5. Align the Mini PCI card with the connector at a 45-degree angle, and press the Mini PCI card into the connector until it clicks.
6. Connect the antenna cables to the Mini PCI card.
1 securing tabs
NOTICE: To avoid damaging the antenna cables or the Mini PCI card, never place the cables under the card.
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card.