These pliers are used to capture signals from lower and higher limbs.
The white tweezers collect the LA signal (left arm) which is the lead from the left arm.
The green tweezers collect the LL signal (left leg) which is the lead from the left foot.
The red tweezers collect the RA signal (right arm) which is the lead from the right arm.
The green tweezers collect the RL signal (right leg) which is the lead from the right foot.