Newlife provided two methods to connect this type of upgrade to your Mac. One was the Killy Clip and the other was a set of header strips.
The Killy Clip is a clear plastic housing with contacts inside and pins sticking up from the two long edges of the top surface. One snapped the housing over the 68000 CPU and the internal contacts connected to the pins of the DIP 68000. Then the pins above the clip plugged into the 64 pin socket you see on the bottom of the NewLife upgrade.
The chances of you finding a Killy Clip in the wild are extremely low. I have one. It's not leaving my sweaty little palms.
The second method of connection is something you should be able to manage. First, get a header strip. A header strip is just a strip of pins held together by plastic.
Get a pair of these, 32 pins long.
Get another 64 pin socket like the one soldered to the board.
Install the two header strips in the socket. Now ease the header strips/socket assembly over the top of the 68000, so that the pins of the header strips are each touching one pin on the 68000. Yes, this looks upside down, as the pins of the socket are sticking up in the air.
If you can, get someone else to hold it in position, or maybe apply a little modeling clay to the top of the 68000 and over one of the plastic crossbars on the socket, so that the strip/socket assembly is held in position.
Now carefully solder the pins of the header strips to the pins of the 68000 chip. It's probably best to do the four corner pins first, as that will hold the assembly in place while you do the rest of the pins.
When you finish soldering, remove the socket from the header strips. It was just there to hold the header strips in the proper position.
Now plug the socket of your NewLife upgrade into the soldered and properly positioned header strips projecting from the 68000 chip. If you need a little more vertical clearance, leave the first socket in place, although this does introduce extra connections which could affect reliability.
Yes, the other connector/cable on that upgrade is for some form of external video. I really want one of these upgrades back in the day with the external video option. Unfortunately, you might need a driver to make the video work. I'm not sure.