As Potsy says its an easy enough job if you've got some allen keys or a multi tool JF.
If the pads are the same as the 7100, loosen the pad nut with an allen key, apply the brake so it clamps the pad to the wheel, align it so it doesnt touch the tyre or hang off the bottom of the rim, and tighten the nut tight (brakes still on). As you tighten, you'll probably find the pad will twist out of position a little. you may need to try again if it doesnt look right.
Once tightened, spin the wheel and make sure its not rubbing the tyre then test the brakes are working. Then holding the ends of the pad with your thumb and forefinger at each end (again to make sure it doesnt twist out of position), just make sure its really tight (without overdoing it and damaging the nut with the allen key)
Its all good basic stuff, if you're not happy with the result, it only takes a couple minutes a try.
Apologies if thats a bit basic...we dont know how good your DIY skills are.