222 is different
The stainless-steel "compression post" on the 222 should bolt to the inside of the cabin top using the bolts for the tabernacle (may need longer bolts) and then apparently bolts to the main bulkhead on the side towards the V-berth. I'm surprised that Rudy did not include instructions when he sold the part to you, unless you were able to find another source for this part. I will post a web-site below that has a 222 brochure including a pic of the S/S post in place. Look for the link to "model info", I think. Calling Rudy is still a good idea, he should be able to send you a sketch of how the post is mounted. (508) 644-3001, fax (508) 644-3002