The low groove is coming from Belgrad's self feedback oscillator modulated by Dfam, high groove is coming from Crucible.

The main modulation source is Moog Dfam shown as below:
VCA EG out -> Belgrad Reso
VCF EG out -> Belgrad !V Oct
VCO1 out -> VCF Decay

Pitch out -> Crucible Velocity
VCO2 out -> Crucible Decay
Trigger out -> EDGE

Main control:
Belgrad LL and LB mode, cutoff from 7 clock - 10 clock is the sweet spot
Dfam: VCF decay, and VCA Decay