You will only get 6 amps out of the iSDT Q6 Plus with the CP16027 power supply attached to it, so no, you will not be able to use the full capability of the Q6 Plus with that setup.
The Banggod supply should be pretty simple, I looked at it on the website but I think they show it wired up incorrectly and incompletely.
The 3 prong power plug that goes to AC from your wall socket goes to the 3 screws on the right
The green and yellow goes to the Ground symbol screw
The blue goes to the N labeled screw
the brown goes to the L labeled screw
The XT60 should go to the +V and -V screws (any of the 3 in the + or - section)
The black wire should go to one of the 3 screws in the -V section
The red wire should go to one of the 3 screws in the +V section.
Test for your +12v to be on the XT60 with your voltmeter to be sure I am right before you plug it into the Q6 Plus.
And last but not least, these Banggood supplies have had some premature failures reported, and it can be dangerous with the connections out in the open like that, so be very careful.
And since I can't be there to look over your shoulder you will need to do this all very carefully at your own risk.
Good luck and let us know how it turns out.