Greasing aftermarket UCA bushings question

Just a question about the steps to greasing the bushings on my Camburg UCA mostly if my truck needs to be jacked up as to relieve pressure on the bushings before loosening the nuts.

Before applying grease through the zerk fittings the nuts need to be loosened that are holding the bushings together. What I don't know is if there is still pressure on the bushings if the nuts are removed that jacking up the truck will alleviate said pressure. I can reach the nuts with the truck leveled and wheels still on as to make the greasing relatively straight forward.

Haven't messed with the suspension system and related parts before. Not sure if the nuts next to the bushings are just there to put pressure on them or if they're holding parts in place that could damage if the truck is not jacked up.

Apologies if this is a nooby question. My knowledge is fairly basic and I'd rather come here for clarification before I potentially ruin anything.

If anyone here with Camburg UCA's or related UCA's could tell me their process when greasing the bushings, would appreciate it

 

https://m.youtube.com/watch?v=wvV5jrTds9o

 

Thanks much for the video link. Though my main concern is if the truck needs to be jacked up or not as to alleviate any pressure on the components if any is. I can get to the nuts just fine with the wheel still on, but if its optional to jack up the truck is my main concern.

 

You're over thinking it. Just put grease in them however you can