Optical Drive SATA/Motherboard Connection Disconnect - Unibody MBP

[rick3000]

I upgraded my 09 MBP to a dual drive (SSD in primary bay/original HDD in optical drive). It's great, however twice now, I have had the SATA/Motherboard connection from the optical drive come loose. Both times the computer received a little jolt (I tripped/dropped my bag), but it was never an issue before it was disconnected for the initial HDD install.

Is there any trick to keep it stuck down, or is normal for it to come loose like this once it has been disconnected once?

Thanks!