Fuel pump remova/install question -1990 100q

[SJ]

I got my noisy fuel pump out.
Will be replacing it with a Pierberg pump.

The fuel pump holder does not look as described in my manual for this model
and year.
It should look like this:
http://www.sjmautotechnik.com/trouble_shooting/fuelpump.htm#early200

But , it looks like this:
http://www.sjmautotechnik.com/trouble_shooting/fuelpump.htm#late200

The fuel pump was loose in its holder when I removed it.
According to the SJM instructions, the pump in its housing is supposed to be
installed with the tool 3214, turn 1/2" to lock it in place. Also, the tool
is supposed to be used to unlock the pump.

Question: Can I lock the pump in without this tool?  Will my hand supply
enough force and torque to lock the pump into place?

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q