Need advice on installing an oil filter adapter

Well guy's and galls, I am looking at my oil filter, removed it and now wondering how do I remove the spin on bolt so I can put my adapter bolt on my 360, I don't want to mess up threads to try and remove it. I have never put an angle adapter on so :)
and I have looked for instructions , not seeing any good info on removing the spin on bolt, I know there is a seal behind the plate.. I am lost .. Thank you again for all your help.

0000055.jpg