I was going to say “with great difficulty” but I had not thought of wires with these little hook connectors.
Just what are you going to do here. These zero crossing devices are designed to switch or provide a signal when the input voltage crosses Zero volts (AC input). If this input does not go to zero it will not switch so no meaningful output.
I just had a look at the schematic of that zero crossing evaluation board. It looks like the 5V for the output pulse is provided by a 100k pull up resistor. If this is the case it WILL NOT drive the LED in the opto isolator. You will need an OP amp or something in between connected as a voltage follower to supply the current for the LED.
To get your 5V you will need a “rail to rail” Opamp, the LM741 is not one of these (I don’t think).
PS. Although the 741 will work with a single supply I think it refers a split (+ & -) supply. You could get 5V output by using a higher supply voltage but to get anywhere ground pin 4 would have to connect to a negative supply of at least 2V. Easier to use a rail to rail amp.