That's the reverse lock out switch. Not required with this style pump. Chop the wires off at the switch (my pink crosses). Join the free ends together.
On the 3 button panel you have IN (bottom button), UP/OUT (middle button) and UP (top button).
At the moment the IN button should be working, and you should be able to get the drive to raise by pressing the middle and top buttons together. If you want the drive to go up with just the middle button, you need to connect the trim limit switch to the 2 wires I have circled. If the trim limit switch no longer works (at that age, most don't) then just connect a short jumper wire between the 2 wires I have circled. Just be aware that doing that will allow you to trim the drive all the way to full UP with just the middle button.
Here's the full circuit diagram.
Chris........