Yep, I love plugging, its my preferred ROA. While thats not a huge jump in BA, the time to peak should be reduced which is what makes it a great route even if there's not a huge increase in BA.
Get an oral syringe (usually used for giving children syrup medications), any pharmacy should have one, and take apart a pump soap dispenser and get the tube out of the pump part. Cut that tube down to ~2 inches and superglue it onto the tip of the syringe and let it dry. This will make it much easier to insert and will work as a guide to show you how deep to go in. Mix your powder with 5-9mL of water and let it dissolve. Draw it into the oral syringe and lubricate the tube with vaseline, then as soon as possible after a bowel movement slowly slide the syringe in. Once the tube is fully inside, slowly depress the plunger and stay on your side for a few minutes and enjoy as you get hit with an experience somewhat close to IV'ing with none of the danger that comes with needles.