Using a PDA Griffin on a Trap Bar?

Bigger Stronger Leaner Competitive Bodybuilding
1 
Here is the link.

http://www.fractionalplates.com/cgi-bin/edatcat/PDAstore.cgi?user_action=detail&catalogno=16.1

I have a PDA trapbar and I have been thinking about using this Griffin contraption for a Squat-like workout.

I don’t have a power rack.

2

How would you load it up and get the harness on if you don’t have a squat rack?

3

It looks like you can just lash it to the bar and slip under the harness.

4

I bought that bad boy a long time ago. Works well. I use the help of two sawhorses to get strapped in. However, I moved and don’t have a need for the device.