1.When use A4988/DRV8825/MKS TMC 2100 , it needs to take care of its direction, otherwise, the driver will be burned easily.
2.Move the wire jumper to ON DP that means 16 microstep (4988)or 32 microstep (8825)
3.Jm connects with motor.
4. Jv connects with 5V and 12V-24V power .
5.E\S\D\G of Jc respectively connecte to the driver signal output of Enable\Step\Dir\Gnd.
6.Megatronics and Our MKS-Gen allows you to connect an external stepper driver for alls axis.
7.Minitronicsand Our MKS-Gen allows a fifth stepper driver. Using this board you can take advantage of that feature.
8.You can hook up multiple external stepper drivers in series, which allow you to run as many stepper drivers on one axis as you need.
9.Easily use with MKS GEN,MKS BASE2,and MKS SBASE,etc.
Below website is more info about MKS SBASE with this adapter .