Buick 1993 Century Owner's Manual page 195

I
1;
4. Attach a separate safety chain around the outboard end
of each lower control arm.
Before hooking up to a tow truck, be sure
to
read
all
the
information in "Towing Your Buick" earlier in this part.
1. Attach T-hook chains on both sides
in
the slotted holes
in the floor pan just ahead of the rear wheels.
193