Z440 - Mount Thunderbolt card in slot 5?

Hi, we are trying to install a Z440 with a GTX1070 together with a HP Thunderbolt card (the Thunderbolt will only be used for external hard drives, no graphics). There will also be a Blackmagic Decklink card in this Z440.

I had a hard time finding a GTX1070 that could go into slot 5, but I finally did find one. My idea was to then use the thunderbolt card in slot 3, as it is said it should be mounted. The cable from the thunderbolt card did however stick up from the motherboard so much that I couldn't put the GTX1070 back into slot 5. The cover for the fan on the GTX1070 was reaching the connector from the thunderbolt card, making it imposible to lock in place.

So, question now is. Did anyone try to use the Thunderbolt card in slot 5, or other then slot 3? As I said we will only use it to connect external hard drives. We will not use it for graphics in any form. If it works I could just put GTX1070 in slot 2 and all is fine.

Best regards.