Replace a specific character in a serie of words (strings)

Hello everyone,

I don't if what I am asking is feasible with Excel.

Basically I have multiple columns that will help me to generate a value in the final one (to generate a computer name).

Example:

Column1 (for location) will have:
H
W
S

ColumnX (for computer name) will therefore get or replace in the character number 6 of its string the value of the cell in column 1 for that row.

xxxxxHxxxx
xxxxxWxxxx
xxxxxSxxxx

So is there a way to automatize this ? I did not find what I wanted with REPLACE.

Thank you ! :)