The fixed anchor is formed as shown above from a piece of 1/4W resistor lead soldered to the PC board. I suggest that you use a contact to attach the Muscle Wire as you did for the "T" bar. Another option is to tie the end of the Muscle Wire to the fixed anchor using a constrictor knot. (shown in the inset above) In either case adjust the wire length such that the "T" bar is in approximately the correct position, squeeze shut the fold back if tying the wire, and touch the joint with a bit of solder to prevent the Muscle Wire from sliding from side to side, or slipping loose.