mustang pillar gauge pod

I got one of these for sale http://www.summitracing.com/parts/ATM-12121/

Good condition and will come with the stock pillar as well so you don’t have to modify your own. $45

http://img194.imageshack.us/img194/1556/img0749m.th.jpg

What modifying has to be done?

drill holes for push pins and a hole to run your wires through