From last picture tighten the 3 hex screws on each cam gear to 10nm with the timing block installed as shown remove then remove the cam center bolt and lift the whole assembly(cam gears and timing block) altogether, then after the rebuild you put it back the same way.
Now since you removed the cam gears you need to put back the timing block between the gear sleeves to counteract the spring and extend the gear and tighten the hex screws with washers so the assembly is ready for installation.
You may not have difficulty to extend the intake cam gear but he exhaust gear is hard. There is a tool in TIS that you install it on the exhaust cam gear teeth to help align the teeth and counter act the spring to allow you to install the M8X18 bolt on the back of the exhaust gears, this bolt will stop the cam gear from retracting and allow you to put the timing block and tighten the hex screws to be ready for installation.
A member in the forum (other than me) after he installed the exhaust cam gear he installed a long bolt on the sleeve from Forward to Back in one of the sleeve holes to push the sleeve back and extend it then you can tighten the 2 remaining hex screws to hold the cam gear extended then he removed the bolt and installed the third screws. I think that what he did if I still remember, hope you get the idea and understand the timing position of the cam gears.
This is the tool picture:
View attachment 957719
What I think is possible to realign the exhaust gear
View attachment 957720
If you used long bolt to extend the exhaust cam gear to may not need to install the M8X18 bolt, just tighten the sleeve with the remaining 2 hex bolt with washers to hold it extended.