Thanks for the quick answer.
I just went out for a look, and finally located the X1716. I was missing the lead from the fuse as well, so no luck using that one. I also removed everything around the fuse compartment, but it's impossible to connect anything there without taking the hole dash apart.
I may use something called a fuse tap kit, or I go the same route as you did. If you take a look into the WDS the amp doesn't get any power as long as the car is locked with the OEM solution, but if you connect it straight to the battery, then it's powered up all the time. Have you noticed any problems regarding this? Have you had the car sitting still for like a week or three?