Watlow MLS - Manual (Page 44)

32 MLS User’s Guide
Installation
Ribbon Cable Recommendations
Use the 50-pin connector for both ends of the 50 pin flat ribbon cable.
(Do not connect either end to a screw terminal; the cable wire is too
small to withstand much flexing.)
Do not exceed 15' of 50-conductor cable.
Using the Cable Tie Wraps
When you have wired outputs to the TB-50, install the cable tie wraps
shipped with it. This diagram shows the cable tie wrap holes.
Each row of terminals has a cable tie wrap hole at one end. Thread the
cable tie wrap through the cable tie wrap hole. Then wrap the cable tie
wrap around the wires attached to that terminal block.