Honestly, I'm 300 miles from my Focus and am on a work trip and am driving a rental. I can snap a pic of mine and show you how I routed my zip ties. However, I went the SRI route, I didn't make the down tube. Too many puddles around, especially during the spring thaw, so to be safe I stuck with the SRI.
My reason for going the "homemade" route was pretty freakin easy. The Steeda SRI would've cost me over $300, but my homemade one cost me less than $40 :)
Snorkel Delete / K&N E2993