hydraulic fluid reservoir weld broke

Latter...after looking more closely the resivor and the valves, motor etc..arenbopted on to the bracket. So I can remove them by only two bolts. My question now is to see if there is any way to unbolt that conglomerate of valves and limes, set them aside so to speak while the bracket is rewelded to the frame. I'm not sure I would ever find enough markings to mark all the lines. Also, if I do remember any of the returns to empty the hydraulic system...what can I expect...or...I mean I assume just a bucket is needed to catch all the fluid...I'm not worried about save my it...just wondering if any of that system will be under pressure when the jack's and slide are in