the nosecone has these two flaps on each side (dark gray part - not the rotating drill itself but the part it's attached to) which pegs in the slat holes which are his feet in robot mode, that should keep the cone down and in place.
Those side parts rotate around that pole it's on . push them down.
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]