to retain the cable with respect to the ear 128 the rod 129 as shown passes upwardly through the block 119a of the gear box the block 119a provides a sliding guide for the rod the rod extends through a provided opening in the horizontal wall of frame member 108 and is abutted against the base wall of the load distributing channel 24 the rod 129 can be held in place with respect to this channel with a suitable small cap screw or pin indicated at 131 so that the rod will not separate from the load distributing channel a lock lever 135 is pivotally mounted with a suitable pin 136 to the lower side of the block 119a and is provided with an opening for passage of the rod 129 in addition a second opening 137 is provided for the cable 125 and this opening can be formed by punching partially through to round off one edge 137a to avoid wear on the cable the outer end of the latch lever 135 is spring loaded with a spring 138 to urge the latch lever about its pivot on pin 136 so that the rounded end 137a of the opening 137 will be urged against the cable 125 when the cable is under tension the latch lever 135 will be held in its position as shown in fig9 and the rod 129 will be free to slide axially through the provided opening in this latch lever 135 however as shown the push rod 129 has spaced notches 140 defined therein which are of size.