I'm trying to connect my motors to the board in a nice way. I thought it might be nice to use mini-XLR connectors and drill holes in a blank PCIe bracket. 

I do not recommend doing this with a hand drill

However, this is my personal log of how I did it with pliers and a handdrill...

Step 1: Cut out parts of the grill where the connectors are going to be placed

Then, with an "erbauer cone drill bit" make the flower shapes into hole shapes but do so with the drill put IN REVERSE.

They will still be too small to fit the connector, but now you can carefully try drilling with the drill in the forward direction. Make small increments until the connector can be pushed through

Then all that's left is finish up, and in a later post we'll be wiring the motor controller outputs to these ports.