My dad's old guitar

Today I fixed my dads old guitar, the poor thing hasn't had strings since the 90's, it felt so good seeing my dad happy playing around with it after more than 20 years.
It has got 5 strings though, I couldn't install the 6th because the part to tune it was broken, tomorrow I will see if I can buy that part, still 5>0.

Some important context: When I came to my dads house I didn't want to forget what I learnt to play on my bass so I came with my bass and amp, thats when I remembered my dad had an old electric guitar and thought it still had one string, so I wanted to try it with my amp, sadly it didn't lol.