That is weird. Where did you get your TB? If you ordered it from Intense or ZZP they might swap it out for you...
You seem to be mechanically inclined so it should be an easy fix if you can not get your TB swapped out. You are suppose to have a nipple on your TB (see red circle). Sco is right, it looks capped or plugged with something that you might can take out and/or drill through then install a nipple for vacuum. You can drill and tap your adapter plate also installing a nipple there.
Next question might be a stupid one, but isn't the hole circled in yellow the evap port on the Gen V? Doesn't it see vacuum or no? I've always wondered if one can use some plate with a nipple on it so you could just loop your pvc around to it instead of just blocking it off. I'd route all the pvc barbs/ports to it and not tap into anything existing.. Just my $.02
