I recently purchased a set of Custom Shop 69 Strat pickups with the intention of replacing the Noiseless pickups set in my MIM Classic 70s Strat. I've never soldered before but have read up on it and was thinking of this being my first attempt. I opened up the pickguard and saw an orange cap near the tone pots. What could this be? Also the pots seem to have taller posts. Would switching out the Noiseless set for the CS 69 be simple? I would just de-solder the original pickups and solder in the new set? Not sure if I should keep the orange cap. I have some photos of the wiring here: https://imgur.com/a/ghNlQKh Also, any recommendation for a soldering iron set I can use that will last? There are so many options that I am unsure which is best. I plan to do more soldering like this if all goes well. Thanks for reading.