Merge two numeric variables from 2 different tables

[QlickySense]

Hello,
I got two numeric variables - Var1 and Var 2 in 2 different tables - A and B. They represent the same data so its safe to merge them

What I got now is:

Table A - Var1

100

200

300

Table B - Var2

100

200

300

What I would like to achieve

Var3

100

100

200

200

300

300

Could you help me resolving this problem? I've tried concatenate load but it doesn't quite work like I would like it to

Thank you in advance and have a good day! 🙂